The document discusses the biomechanics of the cervical spine. It describes:
1) The cervical spine is made up of two segments - the superior occiput-C2 segment and inferior C3-T1 segment.
2) A typical cervical vertebra has a vertebral body, pedicles, lamina, spinous process, transverse processes and articular processes.
3) Movements of the cervical spine include flexion, extension, lateral bending and rotation which are governed by the orientation of the facet joints.
4) Stability is provided by the bony anatomy, muscles like the deep and superficial neck flexors and extensors, and ligaments like the transverse atlantal lig
The document summarizes the kinesiology of the cervical spine. It describes the biomechanics and structure of the cervical spine segments. The cervical spine is made up of two segments - the superior segment consisting of C1 and C2 which connects to the occiput, and the inferior segment from C3 to C7. It details the typical structure of cervical vertebrae including the vertebral body, processes, facets and discs. It also describes the movements between vertebrae including flexion, extension, lateral bending and rotation. Key ligaments and muscles that provide stability and enable movement are also outlined.
The cervical spine consists of 7 vertebrae divided into the cranio-vertebral region and lower cervical spine. The cranio-vertebral region includes the atlas and axis. The atlas has facets that articulate with the occiput and axis. The axis has a dens that articulates with the atlas and allows axial rotation. The atlanto-occipital joint connects the occiput to the atlas. The atlanto-axial joint has median and lateral joints connecting the atlas and axis. Ligaments like the transverse ligament and alar ligaments connect the atlas and axis and limit their movement.
The knee joint is complex with three bones - the femur, tibia, and patella - forming two joints, the patellofemoral and tibiofemoral joints. The knee allows for flexion/extension in the sagittal plane as well as medial/lateral rotation in the transverse plane. Cruciate ligaments like the ACL and PCL provide stability while menisci absorb shock and increase joint congruence. Proper biomechanics and alignment of the femur and tibia distribute weight forces evenly across the knee. Injuries require clinicians to have extensive knowledge of the knee's intricate nature.
The document summarizes the structure and biomechanics of the cervical spine. It describes the seven cervical vertebrae and their typical and atypical features. It discusses the distinctive structures of the atlas and axis vertebrae. It also outlines the articulations between vertebrae including the atlanto-occipital and atlantoaxial joints. Additionally, it summarizes the ligaments of the craniovertebral region and the motions and couplings between vertebrae in the cervical spine.
The document provides an overview of spinal anatomy including:
1) It describes the coronal, sagittal, and axial planes used to view the spine on imaging and their anatomical divisions.
2) The basic structures and functions of vertebrae are outlined including protection of the spinal cord, flexibility, and load distribution.
3) Ligaments, joints, vasculature and innervation of the spine are summarized at different regions from cervical to lumbar.
this is a slide show which gives in brief about anatomy and detailed description about biomechanics as well as pathomechanics of shoulder joint. various rhythms of shoulder complex are discussed as well along with the stability factors
The cervical spine functions to house and protect the spinal cord, support the head and facilitate movement. It has a normal anterior curvature of 20-40 degrees. Non-palpable structures include the cranium, mandible, and vertebrae. Palpable structures are the superior nuchal line, external occipital protuberance, mastoid process, and vertebral levels C3-C6. Typical cervical vertebrae have transverse processes and spinous processes while C1-C2 are atypical. The intervertebral discs act as shock absorbers between vertebrae. Key joints are the atlanto-occipital and atlanto-axial, which allow nodding and rotation. Ligaments
The document summarizes the kinesiology of the cervical spine. It describes the biomechanics and structure of the cervical spine segments. The cervical spine is made up of two segments - the superior segment consisting of C1 and C2 which connects to the occiput, and the inferior segment from C3 to C7. It details the typical structure of cervical vertebrae including the vertebral body, processes, facets and discs. It also describes the movements between vertebrae including flexion, extension, lateral bending and rotation. Key ligaments and muscles that provide stability and enable movement are also outlined.
The cervical spine consists of 7 vertebrae divided into the cranio-vertebral region and lower cervical spine. The cranio-vertebral region includes the atlas and axis. The atlas has facets that articulate with the occiput and axis. The axis has a dens that articulates with the atlas and allows axial rotation. The atlanto-occipital joint connects the occiput to the atlas. The atlanto-axial joint has median and lateral joints connecting the atlas and axis. Ligaments like the transverse ligament and alar ligaments connect the atlas and axis and limit their movement.
The knee joint is complex with three bones - the femur, tibia, and patella - forming two joints, the patellofemoral and tibiofemoral joints. The knee allows for flexion/extension in the sagittal plane as well as medial/lateral rotation in the transverse plane. Cruciate ligaments like the ACL and PCL provide stability while menisci absorb shock and increase joint congruence. Proper biomechanics and alignment of the femur and tibia distribute weight forces evenly across the knee. Injuries require clinicians to have extensive knowledge of the knee's intricate nature.
The document summarizes the structure and biomechanics of the cervical spine. It describes the seven cervical vertebrae and their typical and atypical features. It discusses the distinctive structures of the atlas and axis vertebrae. It also outlines the articulations between vertebrae including the atlanto-occipital and atlantoaxial joints. Additionally, it summarizes the ligaments of the craniovertebral region and the motions and couplings between vertebrae in the cervical spine.
The document provides an overview of spinal anatomy including:
1) It describes the coronal, sagittal, and axial planes used to view the spine on imaging and their anatomical divisions.
2) The basic structures and functions of vertebrae are outlined including protection of the spinal cord, flexibility, and load distribution.
3) Ligaments, joints, vasculature and innervation of the spine are summarized at different regions from cervical to lumbar.
this is a slide show which gives in brief about anatomy and detailed description about biomechanics as well as pathomechanics of shoulder joint. various rhythms of shoulder complex are discussed as well along with the stability factors
The cervical spine functions to house and protect the spinal cord, support the head and facilitate movement. It has a normal anterior curvature of 20-40 degrees. Non-palpable structures include the cranium, mandible, and vertebrae. Palpable structures are the superior nuchal line, external occipital protuberance, mastoid process, and vertebral levels C3-C6. Typical cervical vertebrae have transverse processes and spinous processes while C1-C2 are atypical. The intervertebral discs act as shock absorbers between vertebrae. Key joints are the atlanto-occipital and atlanto-axial, which allow nodding and rotation. Ligaments
The cervical spine consists of 7 vertebrae divided into an upper cranio-vertebral region and lower cervical region. The upper region includes the occipital condyles and C1-C2 vertebrae. The cranio-vertebral region contains the atlas (C1) and axis (C2) which connect to the occipital bone and each other through synovial joints, allowing flexion/extension and rotation. Ligaments like the transverse atlantal and alar stabilize these joints. The lower cervical region from C3-C7 contains vertebral bodies, processes, and facets that transmit forces and allow movement through articulations while being restricted by capsular patterns.
anatomy of atlanto-occipital joint atlanto-axial joint and lower cervical spine. kinematics (includes osteokinematics and arthrokinnematics) and kinetics
The document describes the anatomy and function of the shoulder joint. It discusses the three bones and three joints that make up the shoulder complex. It then summarizes the functions of the shoulder joint and describes the anatomy of the glenohumeral joint, acromioclavicular joint, sternoclavicular joint, scapulothoracic articulation, ligaments, muscles, nerves and blood supply of the shoulder region.
The knee is a complex joint composed of the tibiofemoral and patellofemoral joints. It functions to provide mobility and support body weight during both static and dynamic activities. The knee joint contains menisci that increase joint congruence and distribute weight forces. It also contains cruciate and collateral ligaments that restrict motion and provide stability. During flexion and extension, the tibia glides and rotates on the femur through rolling and sliding motions controlled by the ligaments and menisci.
The cervical spine consists of seven vertebrae that provide mobility but less stability than other regions of the spine. It has three subsystems that contribute to stability - passive (bones and ligaments), active (muscles), and neural control. Cervical instability occurs when the neutral zone between ranges of motion increases, the stabilizing subsystems can no longer compensate, and motion quality becomes poor. It can result from trauma, surgery, disease, or degeneration and often involves pain.
Spine fractures can occur in any part of the spine, including the cervical, thoracic, lumbar, sacral, and coccygeal regions. Cervical spine fractures are discussed in detail. The cervical spine anatomy is described, including the unique features of C1 and C2. Various types of cervical spine fractures are outlined based on the mechanism of injury, including flexion, extension, compression, and whiplash-related injuries. Clinical criteria for cervical spine instability are also provided.
this is a presentation on atlanto-axial and atlanto-occipital joints. after reading this, most of you will know about atlas and axis, joint type, anatomy of joint, movements allowed by joint and its clinical considerations.
The cervical spine consists of 7 vertebrae, with C1-C2 being atypical and C3-C7 being typical. The atlas (C1) forms a ring and articulates with the occiput and axis. The axis (C2) has a strong odontoid process that provides attachment for ligaments. The cervical spine is stabilized by anterior and posterior longitudinal ligaments as well as intervertebral discs and facet joints. Ossification of the cervical vertebrae begins in utero and continues throughout childhood, with fusion of parts occurring between ages 3-13 years. The cervical spine gives rise to the cervical plexus and brachial plexus, with C1-C4
The cervical spine has 7 vertebrae. The atlas and axis have unique features. The atlas lacks a vertebral body and has superior and inferior articular facets that articulate with the occiput and axis, respectively. The axis has a strong odontoid process that articulates with the atlas via alar ligaments. The lower cervical vertebrae (C3-C6) have pedicles, laminae, transverse processes, and spinous processes. C7 has a long, prominent spinous process. Various ligaments including the anterior longitudinal ligament limit extension while the posterior longitudinal ligament limits flexion. Ossification of cervical vertebrae begins in utero and continues into early adulthood
The document summarizes the biomechanics of the spine, including its main structures and movements. It discusses the 33 vertebrae divided into cervical, thoracic, lumbar, sacral, and coccygeal regions. It describes the normal spinal curvatures and mobile spinal segments composed of vertebrae and discs. The document outlines the anterior and posterior portions of spinal segments, facets, processes, and ligaments. It also summarizes the range of motion at each level and coupling of spinal movements, as well as the main flexor and extensor muscles.
The craniovertebral junction (CVJ) refers to the occiput, atlas, axis, and supporting ligaments. It develops from the occipital somites and proatlas in utero. Key ligaments stabilizing the CVJ include the transverse atlantal ligament, alar ligaments, and apical ligament. Neural structures like the medulla, lower cranial nerves, and vertebral artery pass through the CVJ.
Atlanto occipital and atlanto axial jointShubham Singh
Anatomy:
>Atlas is the topmost vertebra and chief peculiarity of atlas is that it has no body, it is ring like and consist of anterior and posterior arch and two lateral masses.
>Axis, the 2nd cervical vertebra has a concave under side and convex from side to side. The most distinctive characteristic of this bone is strong odontoid process, the dens.
TheJoint:
>Atlanto-occipital joint (articulation between the atlas and the occipital bone) consists of a pair of condyloid joints.
>The atlanto-occipital joints are synovial socket-type joints
Ligaments:
> Posterior atlanto-occipital membrane: extend from anterior arch of atlas to posterior margin of foramen magnum.
>Anterior atlanto-occipital membrane: extend from anterior arch of atlas to anterior margin of foramen magnum.
>The ligamentam flavam join laminae of adjacent vertebral arches.
>The interspinous ligaments expand to form the ligamentum nuchae which inserts along the posterior foramen magnum and external occipital condyle.
> The following four ligaments stabilize these joints:
1.Apical ligament: Connects the dens to the foramen magnum of the occipital bone.
2.Alar ligaments: Connect the dens to the lateral margins of the foramen magnum.
3.Cruciate ligament: Attaches the dens to the anterior arch of the atlas and the body of the axis to the foramen magnum of the occipital bone.
4.Tectorial membrane: Starts at the skull and becomes the posterior longitudinal ligament.
>Atlanto-axial articular capsules are thick and loose, and connect the margins of the lateral masses of the atlas with those of the posterior articular surfaces of the axis.
Muscles:
>Flexion is produced mainly by the action of longis capitis, rectus capitis anterior and sternocleidomastoid (anterior fibres)
>Extension by the rectus capitis posterior major and minor, the obliquus capitis superior, the semispinalis capitis, splenius capitis, longissimus capitis, sternocleidomastoid and upper fibres of the trapezius
>The recti lateralis are concerned in the lateral movement, assisted by the trapezius, splenius capitis, semispinalis capitis, and the sternocleidomastoid of the same side, all acting together.
Movements:
>Flexion and extension in the Sagittal axis, which give rise to the ordinary forward and backward nodding of the head.
>Lateral flexion to one or other side in the Frontal axis(titling of head
>Lateral AAJ Movement: It is a synovial joint which allows only gliding
>Medial AAJ Movement: This joint allows the rotation of the atlas the axis i.e round the dens.
Clinical anatomy:
> Headaches can arise from many different sources including dysfunctional muscles, tears in the ligaments, misalignment of the vertebral bodies, injury to cervical facets and degenerative discs.
>Excessive flexion could rupture the supraspinous ligament.
>Posterior atlanto-occipital membrane ossification cause migraine headaches due to compression of artery.
This document discusses the anatomy and kinematics of the knee joint. It begins by describing the three bones that make up the knee - the femur, tibia, and patella. It then discusses the anatomy of the femoral and tibial surfaces, as well as the patella. Next, it covers the ligaments that provide stability to the knee, including the medial and lateral collateral ligaments, anterior and posterior cruciate ligaments, and menisci. The document then discusses the blood supply and innervation of the knee. It concludes by explaining the different theories of knee kinematics, including rolling back of the femur, the four-bar linkage model, and screw home motion.
The document describes the anatomy of the thorax, including the bones (thoracic vertebrae, ribs, sternum), joints (costovertebral, costotransverse, costochondral, chondrosternal), and movements (flexion, extension, lateral bending, rotation). It discusses the roles of the ribs, sternum, and associated ligaments in providing stability and allowing ventilation of the lungs during breathing.
The document summarizes the anatomy and biomechanics of the shoulder joint. It describes the three joints that make up the shoulder complex - the sternoclavicular joint, acromioclavicular joint, and glenohumeral joint. For each joint, it outlines the bony structures, ligaments, range of motion, and stabilizing muscles involved. It then discusses the kinetics of the glenohumeral joint, including the static stabilization of the humeral head both with the arm unloaded and loaded at the side through the resultant force of surrounding structures.
The document summarizes key aspects of the shoulder complex, including its bones, joints, muscles, and functions. Specifically, it notes that the shoulder complex is composed of 4 bones, 20 muscles, 3 bony articulations, and 1 false articulation. It then provides details on the bones (manubrium, clavicle, scapula, humerus), joints (sternoclavicular, acromioclavicular, glenohumeral, scapulothoracic), and kinematics and ligaments of the sternoclavicular and acromioclavicular joints.
Dr. Javed Hassan Raza spine anatomy and biomechanics.pptxAkmalZaib1
The document summarizes the anatomy and biomechanics of the spine. It describes the basic structure of the spine including that it has 33 vertebrae separated into 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal vertebrae. It outlines the three anatomical planes (sagittal, coronal, axial) used to view the spine. It details the primary and secondary curves of the spine as well as the normal ranges of curvature. Additionally, it describes the basic structures of vertebrae including the vertebral body, processes, joints, and foramen. It highlights features and differences between cervical, thoracic, lumbar, and sacral/coccygeal vertebra
The shoulder complex is composed of four joints that link the upper extremity to the thorax. It includes the sternoclavicular joint, acromioclavicular joint, scapulothoracic joint, and glenohumeral joint. The shoulder complex provides a large range of motion but has more laxity than other joints, making it prone to instability and injury without the dynamic stabilization of muscles and ligaments. The glenohumeral joint in particular is a ball-and-socket synovial joint surrounded by a large capsule that relies on reinforcement from ligaments and the rotator cuff muscles.
The document summarizes the anatomy and biomechanics of the foot and ankle. It describes the 26 bones that make up the foot, divided into the forefoot, midfoot, and hindfoot. It outlines the joints of the foot and ankle including the ankle joint, subtalar joint, transverse tarsal joint, and tarsometatarsal joints. It discusses the ligaments supporting each joint and the motions associated with walking, such as pronation and supination. Overall, the foot provides stability, mobility, shock absorption and propulsion during gait.
This document summarizes key concepts about posture including:
1. Posture can be static or dynamic, with static involving maintaining certain body positions and dynamic involving body movement.
2. Maintaining upright posture allows humans to use their arms while increasing stress on the back and reducing stability.
3. Postural control involves the central nervous system integrating inputs from vision, vestibular, proprioceptive, and musculoskeletal systems.
4. Perturbations displace the body from equilibrium, requiring compensatory responses like ankle, hip, or change of support strategies to restore stability.
More Related Content
Similar to biomechanicsofthecervicalspine-150120000612-conversion-gate02.pdf
The cervical spine consists of 7 vertebrae divided into an upper cranio-vertebral region and lower cervical region. The upper region includes the occipital condyles and C1-C2 vertebrae. The cranio-vertebral region contains the atlas (C1) and axis (C2) which connect to the occipital bone and each other through synovial joints, allowing flexion/extension and rotation. Ligaments like the transverse atlantal and alar stabilize these joints. The lower cervical region from C3-C7 contains vertebral bodies, processes, and facets that transmit forces and allow movement through articulations while being restricted by capsular patterns.
anatomy of atlanto-occipital joint atlanto-axial joint and lower cervical spine. kinematics (includes osteokinematics and arthrokinnematics) and kinetics
The document describes the anatomy and function of the shoulder joint. It discusses the three bones and three joints that make up the shoulder complex. It then summarizes the functions of the shoulder joint and describes the anatomy of the glenohumeral joint, acromioclavicular joint, sternoclavicular joint, scapulothoracic articulation, ligaments, muscles, nerves and blood supply of the shoulder region.
The knee is a complex joint composed of the tibiofemoral and patellofemoral joints. It functions to provide mobility and support body weight during both static and dynamic activities. The knee joint contains menisci that increase joint congruence and distribute weight forces. It also contains cruciate and collateral ligaments that restrict motion and provide stability. During flexion and extension, the tibia glides and rotates on the femur through rolling and sliding motions controlled by the ligaments and menisci.
The cervical spine consists of seven vertebrae that provide mobility but less stability than other regions of the spine. It has three subsystems that contribute to stability - passive (bones and ligaments), active (muscles), and neural control. Cervical instability occurs when the neutral zone between ranges of motion increases, the stabilizing subsystems can no longer compensate, and motion quality becomes poor. It can result from trauma, surgery, disease, or degeneration and often involves pain.
Spine fractures can occur in any part of the spine, including the cervical, thoracic, lumbar, sacral, and coccygeal regions. Cervical spine fractures are discussed in detail. The cervical spine anatomy is described, including the unique features of C1 and C2. Various types of cervical spine fractures are outlined based on the mechanism of injury, including flexion, extension, compression, and whiplash-related injuries. Clinical criteria for cervical spine instability are also provided.
this is a presentation on atlanto-axial and atlanto-occipital joints. after reading this, most of you will know about atlas and axis, joint type, anatomy of joint, movements allowed by joint and its clinical considerations.
The cervical spine consists of 7 vertebrae, with C1-C2 being atypical and C3-C7 being typical. The atlas (C1) forms a ring and articulates with the occiput and axis. The axis (C2) has a strong odontoid process that provides attachment for ligaments. The cervical spine is stabilized by anterior and posterior longitudinal ligaments as well as intervertebral discs and facet joints. Ossification of the cervical vertebrae begins in utero and continues throughout childhood, with fusion of parts occurring between ages 3-13 years. The cervical spine gives rise to the cervical plexus and brachial plexus, with C1-C4
The cervical spine has 7 vertebrae. The atlas and axis have unique features. The atlas lacks a vertebral body and has superior and inferior articular facets that articulate with the occiput and axis, respectively. The axis has a strong odontoid process that articulates with the atlas via alar ligaments. The lower cervical vertebrae (C3-C6) have pedicles, laminae, transverse processes, and spinous processes. C7 has a long, prominent spinous process. Various ligaments including the anterior longitudinal ligament limit extension while the posterior longitudinal ligament limits flexion. Ossification of cervical vertebrae begins in utero and continues into early adulthood
The document summarizes the biomechanics of the spine, including its main structures and movements. It discusses the 33 vertebrae divided into cervical, thoracic, lumbar, sacral, and coccygeal regions. It describes the normal spinal curvatures and mobile spinal segments composed of vertebrae and discs. The document outlines the anterior and posterior portions of spinal segments, facets, processes, and ligaments. It also summarizes the range of motion at each level and coupling of spinal movements, as well as the main flexor and extensor muscles.
The craniovertebral junction (CVJ) refers to the occiput, atlas, axis, and supporting ligaments. It develops from the occipital somites and proatlas in utero. Key ligaments stabilizing the CVJ include the transverse atlantal ligament, alar ligaments, and apical ligament. Neural structures like the medulla, lower cranial nerves, and vertebral artery pass through the CVJ.
Atlanto occipital and atlanto axial jointShubham Singh
Anatomy:
>Atlas is the topmost vertebra and chief peculiarity of atlas is that it has no body, it is ring like and consist of anterior and posterior arch and two lateral masses.
>Axis, the 2nd cervical vertebra has a concave under side and convex from side to side. The most distinctive characteristic of this bone is strong odontoid process, the dens.
TheJoint:
>Atlanto-occipital joint (articulation between the atlas and the occipital bone) consists of a pair of condyloid joints.
>The atlanto-occipital joints are synovial socket-type joints
Ligaments:
> Posterior atlanto-occipital membrane: extend from anterior arch of atlas to posterior margin of foramen magnum.
>Anterior atlanto-occipital membrane: extend from anterior arch of atlas to anterior margin of foramen magnum.
>The ligamentam flavam join laminae of adjacent vertebral arches.
>The interspinous ligaments expand to form the ligamentum nuchae which inserts along the posterior foramen magnum and external occipital condyle.
> The following four ligaments stabilize these joints:
1.Apical ligament: Connects the dens to the foramen magnum of the occipital bone.
2.Alar ligaments: Connect the dens to the lateral margins of the foramen magnum.
3.Cruciate ligament: Attaches the dens to the anterior arch of the atlas and the body of the axis to the foramen magnum of the occipital bone.
4.Tectorial membrane: Starts at the skull and becomes the posterior longitudinal ligament.
>Atlanto-axial articular capsules are thick and loose, and connect the margins of the lateral masses of the atlas with those of the posterior articular surfaces of the axis.
Muscles:
>Flexion is produced mainly by the action of longis capitis, rectus capitis anterior and sternocleidomastoid (anterior fibres)
>Extension by the rectus capitis posterior major and minor, the obliquus capitis superior, the semispinalis capitis, splenius capitis, longissimus capitis, sternocleidomastoid and upper fibres of the trapezius
>The recti lateralis are concerned in the lateral movement, assisted by the trapezius, splenius capitis, semispinalis capitis, and the sternocleidomastoid of the same side, all acting together.
Movements:
>Flexion and extension in the Sagittal axis, which give rise to the ordinary forward and backward nodding of the head.
>Lateral flexion to one or other side in the Frontal axis(titling of head
>Lateral AAJ Movement: It is a synovial joint which allows only gliding
>Medial AAJ Movement: This joint allows the rotation of the atlas the axis i.e round the dens.
Clinical anatomy:
> Headaches can arise from many different sources including dysfunctional muscles, tears in the ligaments, misalignment of the vertebral bodies, injury to cervical facets and degenerative discs.
>Excessive flexion could rupture the supraspinous ligament.
>Posterior atlanto-occipital membrane ossification cause migraine headaches due to compression of artery.
This document discusses the anatomy and kinematics of the knee joint. It begins by describing the three bones that make up the knee - the femur, tibia, and patella. It then discusses the anatomy of the femoral and tibial surfaces, as well as the patella. Next, it covers the ligaments that provide stability to the knee, including the medial and lateral collateral ligaments, anterior and posterior cruciate ligaments, and menisci. The document then discusses the blood supply and innervation of the knee. It concludes by explaining the different theories of knee kinematics, including rolling back of the femur, the four-bar linkage model, and screw home motion.
The document describes the anatomy of the thorax, including the bones (thoracic vertebrae, ribs, sternum), joints (costovertebral, costotransverse, costochondral, chondrosternal), and movements (flexion, extension, lateral bending, rotation). It discusses the roles of the ribs, sternum, and associated ligaments in providing stability and allowing ventilation of the lungs during breathing.
The document summarizes the anatomy and biomechanics of the shoulder joint. It describes the three joints that make up the shoulder complex - the sternoclavicular joint, acromioclavicular joint, and glenohumeral joint. For each joint, it outlines the bony structures, ligaments, range of motion, and stabilizing muscles involved. It then discusses the kinetics of the glenohumeral joint, including the static stabilization of the humeral head both with the arm unloaded and loaded at the side through the resultant force of surrounding structures.
The document summarizes key aspects of the shoulder complex, including its bones, joints, muscles, and functions. Specifically, it notes that the shoulder complex is composed of 4 bones, 20 muscles, 3 bony articulations, and 1 false articulation. It then provides details on the bones (manubrium, clavicle, scapula, humerus), joints (sternoclavicular, acromioclavicular, glenohumeral, scapulothoracic), and kinematics and ligaments of the sternoclavicular and acromioclavicular joints.
Dr. Javed Hassan Raza spine anatomy and biomechanics.pptxAkmalZaib1
The document summarizes the anatomy and biomechanics of the spine. It describes the basic structure of the spine including that it has 33 vertebrae separated into 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal vertebrae. It outlines the three anatomical planes (sagittal, coronal, axial) used to view the spine. It details the primary and secondary curves of the spine as well as the normal ranges of curvature. Additionally, it describes the basic structures of vertebrae including the vertebral body, processes, joints, and foramen. It highlights features and differences between cervical, thoracic, lumbar, and sacral/coccygeal vertebra
The shoulder complex is composed of four joints that link the upper extremity to the thorax. It includes the sternoclavicular joint, acromioclavicular joint, scapulothoracic joint, and glenohumeral joint. The shoulder complex provides a large range of motion but has more laxity than other joints, making it prone to instability and injury without the dynamic stabilization of muscles and ligaments. The glenohumeral joint in particular is a ball-and-socket synovial joint surrounded by a large capsule that relies on reinforcement from ligaments and the rotator cuff muscles.
Similar to biomechanicsofthecervicalspine-150120000612-conversion-gate02.pdf (20)
The document summarizes the anatomy and biomechanics of the foot and ankle. It describes the 26 bones that make up the foot, divided into the forefoot, midfoot, and hindfoot. It outlines the joints of the foot and ankle including the ankle joint, subtalar joint, transverse tarsal joint, and tarsometatarsal joints. It discusses the ligaments supporting each joint and the motions associated with walking, such as pronation and supination. Overall, the foot provides stability, mobility, shock absorption and propulsion during gait.
This document summarizes key concepts about posture including:
1. Posture can be static or dynamic, with static involving maintaining certain body positions and dynamic involving body movement.
2. Maintaining upright posture allows humans to use their arms while increasing stress on the back and reducing stability.
3. Postural control involves the central nervous system integrating inputs from vision, vestibular, proprioceptive, and musculoskeletal systems.
4. Perturbations displace the body from equilibrium, requiring compensatory responses like ankle, hip, or change of support strategies to restore stability.
This document provides an overview of biomechanics of posture. It defines static and dynamic posture and describes the major goals and elements of postural control, including maintaining the body's center of gravity over its base of support and stabilizing the head vertically. It discusses perturbations that can disrupt posture and the fixed and change-in-support synergies used to regain equilibrium. Key aspects of posture such as external forces, ground reaction forces, and optimal alignment are summarized. Common postural deviations are also outlined.
The document discusses gait and gait analysis. It defines gait as rhythmic movements of the limbs that result in forward body progression. A normal gait cycle consists of stance and swing phases for each limb. Key points of the gait cycle and factors that affect gait are described in detail. Common gait abnormalities such as antalgic gait, Trendelenburg gait, and functional leg length discrepancy are also summarized.
This document provides information on the biomechanics of the wrist and hand complex. It describes the bones, joints, ligaments, muscles, and range of motion of the wrist, hand, fingers, and thumb. Key points include that the wrist is a complex of two joints (radiocarpal and midcarpal) that allow flexion/extension and radial/ulnar deviation. The hand has 19 bones and joints distal to the carpals that form transverse and longitudinal arches to enhance grip. Each finger has carpometacarpal, metacarpophalangeal, and interphalangeal joints while the thumb only has one interphalangeal joint. Ligaments and muscles work together to provide stability and
This document provides an overview of the anatomy and biomechanics of the ankle and foot. It begins with an introduction to the bones, joints, ligaments and muscles of the ankle and foot. It then discusses the specific motions and functions of the ankle joint, subtalar joint, and transverse tarsal joint. For each joint, it describes the structural features, ligaments, range of motion, and how the joints work together during weight bearing activities like walking. The document aims to explain the complex integrated movements between the lower leg and foot.
This document discusses cardiac murmurs, including their characteristics, timing, location, intensity and frequency. Common cardiac conditions that can cause murmurs are explored through case studies, including details on presentation, physical exam findings, EKG and echocardiography results. Conditions covered include aortic stenosis, mitral stenosis, aortic insufficiency, mitral regurgitation and hypertrophic cardiomyopathy.
The document summarizes the oxygen-hemoglobin dissociation curve, which plots the percentage of hemoglobin in its oxygen-saturated form against the partial pressure of oxygen. It describes how hemoglobin, composed of heme and globin units, can bind reversibly to oxygen molecules. The curve has a plateau portion where little oxygen is released from hemoglobin at high oxygen pressures in the lungs, and a steep portion where hemoglobin readily unloads oxygen at lower pressures in tissues. An important measurement of hemoglobin's oxygen affinity is P50, the partial pressure at which hemoglobin is 50% saturated with oxygen, which can shift based on conditions.
Emotions are feelings that influence behavior and have physiological and cognitive components. There are four basic emotions: happy, sad, afraid/surprised, and angry/disgust. Emotions can be positive like joy or negative like fear. Primary emotions are instinctive responses to stimuli while secondary emotions involve feeling emotions about other emotions.
Theories of emotion include the James-Lange theory that emotions arise from physiological reactions, the Cannon-Bard theory that physiological and emotional experiences occur simultaneously, and the Schachter-Singer theory that physiological arousal combined with cognitive labeling leads to emotion.
Stress can be beneficial (eustress) or harmful (distress) and results from stressors
Clinical psychology involves the assessment and treatment of mental illness and abnormal behavior. It includes diagnosing psychological disorders like those seen in medical settings and treating conditions such as drug and alcohol addiction. Psychosomatic disorders are illnesses that affect both the mind and body, where emotional stress contributes to physical problems in involuntary systems. Somatoform disorders are mental illnesses characterized by physical symptoms that cannot be explained medically and interfere with functioning. Specific types of somatoform disorders include somatization disorder, conversion disorder, body dysmorphic disorder, and hypochondriasis.
Prehension involves grasping objects between surfaces of the hand. There are two main types of prehension - power grip and precision handling. Power grip uses flexion of all fingers and the thumb acts as a stabilizer. Precision handling involves skillful placement of an object between the fingers and thumb. There are different grips for various shaped objects including cylindrical, spherical, hook, and lateral grips. Precision handling requires finer motor control and includes pad to pad, tip to tip, and pad to side grips. The functional position of the wrist and hand allows equal tension across all wrist muscles.
The menstrual cycle involves cyclic changes in the ovaries and uterus that occur over approximately 28 days. It begins at menarche between ages 12-15 and ends at menopause around ages 45-50. The cycle consists of a follicular phase where an egg matures and is released, an ovulation phase where the egg is released, and a luteal phase where the endometrium is prepared for potential implantation. Hormone levels of estrogen and progesterone rise and fall over the course of the cycle to regulate these changes until menstruation begins again if implantation does not occur.
PHYSIOLOGICAL BASIS OF CONTRACEPTION (CONTRACEPTIVE METHODS).pptxShiriShir
Contraceptive methods can be divided into permanent and temporary methods. Permanent methods include vasectomy for males and tubectomy for females. Temporary methods include barrier methods like condoms and diaphragms, intrauterine devices (IUDs), hormonal methods like oral contraceptive pills, and biological methods like abstinence and rhythm methods. Hormonal methods are the most effective temporary methods and include combined and progesterone-only pills, as well as depot injections. Oral contraceptive pills work mainly by preventing ovulation, implantation, and allowing altered cervical mucus to restrict sperm entry.
Oogenesis is the process by which female gametes (ova/eggs) are formed. It begins during fetal development with primordial germ cells that migrate and undergo mitotic division, resulting in around 7 million primary oocytes by the 8th week of gestation. These enter meiotic arrest in prophase I. Folluculogenesis is the growth and maturation of follicles containing the ova. It occurs in four stages from primordial to tertiary follicles, with the late tertiary follicle being around 20mm and containing the nearly mature ovum.
The pupillary reflex allows the eye to adjust the amount of light reaching the retina and protects the photoreceptors. There are two types of pupillary reflexes: the pupillary light reflex and the pupillary accommodation reflex. The pupillary light reflex causes constriction of the pupil in response to light, either directly in the light-stimulated eye or indirectly in the other eye. The pupillary accommodation reflex causes constriction of the pupil, convergence of the eyeballs, and bulging of the lens when focusing on a near object.
The temporomandibular joint (TMJ) is a complex synovial joint that allows the mandible to move through a range of motions including depression, elevation, protrusion, retrusion, and lateral excursion. It is made up of the mandibular condyle, articular disc, articular eminence of the temporal bone, and various ligaments. During opening and closing, the condyle and disc glide and rotate together. The disc increases stability and decreases stress on the joint. The ligaments and musculature provide both passive and active control of movement.
This document describes 4 types of abnormalities of micturition or urination: 1) Atonic bladder which lacks muscle tone and overflows due to nerve damage, 2) Automatic bladder which empties unannounced due to spinal cord damage above the sacral region, 3) Nocturnal micturition which is involuntary bedwetting due to incomplete nerve fiber myelination or spinal defects, and 4) Uninhibited neurologic bladder which has uncontrolled frequent urination from lack of inhibitory brain signals and partial spinal/brainstem damage.
Biomechanics - muscles of lower thorax (Ann).pptxShiriShir
The posterior muscles of the lower thoracic and lumbopelvic regions stabilize the trunk for limb movement and reduce forces on the spine. Key muscles include the erector spinae which extends the trunk, and the multifidus which connects the sacrum to lumbar vertebrae. The thoracolumbar fascia surrounds these muscles and connects to other back muscles and the abdomen.
The document summarizes the pelvic floor muscles (PFM), including their three layers, innervation, fiber types, functions in support, continence and sexual function. Assessment methods are described like digital examination grading scales and tools like perineometers. Dysfunctions are outlined such as supportive, hypertonic, incoordination and visceral. Causes and characteristics are provided for each.
STATATHON: Unleashing the Power of Statistics in a 48-Hour Knowledge Extravag...sameer shah
"Join us for STATATHON, a dynamic 2-day event dedicated to exploring statistical knowledge and its real-world applications. From theory to practice, participants engage in intensive learning sessions, workshops, and challenges, fostering a deeper understanding of statistical methodologies and their significance in various fields."
Orchestrating the Future: Navigating Today's Data Workflow Challenges with Ai...Kaxil Naik
Navigating today's data landscape isn't just about managing workflows; it's about strategically propelling your business forward. Apache Airflow has stood out as the benchmark in this arena, driving data orchestration forward since its early days. As we dive into the complexities of our current data-rich environment, where the sheer volume of information and its timely, accurate processing are crucial for AI and ML applications, the role of Airflow has never been more critical.
In my journey as the Senior Engineering Director and a pivotal member of Apache Airflow's Project Management Committee (PMC), I've witnessed Airflow transform data handling, making agility and insight the norm in an ever-evolving digital space. At Astronomer, our collaboration with leading AI & ML teams worldwide has not only tested but also proven Airflow's mettle in delivering data reliably and efficiently—data that now powers not just insights but core business functions.
This session is a deep dive into the essence of Airflow's success. We'll trace its evolution from a budding project to the backbone of data orchestration it is today, constantly adapting to meet the next wave of data challenges, including those brought on by Generative AI. It's this forward-thinking adaptability that keeps Airflow at the forefront of innovation, ready for whatever comes next.
The ever-growing demands of AI and ML applications have ushered in an era where sophisticated data management isn't a luxury—it's a necessity. Airflow's innate flexibility and scalability are what makes it indispensable in managing the intricate workflows of today, especially those involving Large Language Models (LLMs).
This talk isn't just a rundown of Airflow's features; it's about harnessing these capabilities to turn your data workflows into a strategic asset. Together, we'll explore how Airflow remains at the cutting edge of data orchestration, ensuring your organization is not just keeping pace but setting the pace in a data-driven future.
Session in https://budapestdata.hu/2024/04/kaxil-naik-astronomer-io/ | https://dataml24.sessionize.com/session/667627
1. Biomechanics of Cervical Spine
Biomechanics of
Cervical Spine
Presented By-Debanjan Mondal
MPT(Musculoskeletal), BPT, CMT,
Ergonomist.
2.
3. Made up of two anatomically and
functionally distinct segments.
1.Superior segment/suboccipital
segment-
-consist of c1 /atlas and c2/axis
-connected to eachother and
occiput with complex chain of joints.
-having 3 axes and 3 degrees of
freedom.
4. 2.Inferior segment-
-streching from inferior surface
of axis to the superior surface of
T1.
-In total there are 7 cervical
vertebras-
c1-c2 c3-c6
c7
5.
6. Structure of a typical cervical
vertebra
Vertebral body-superior plateau
is raised on either sides by 2
buttresses.
which is called as unciform process.
It is concave transversely and
convex anteroposteriorly-resembling
a saddle .
Unciform processes guoides the AP
movements during flexion and
7.
8. Pedicals-connects the vertebral
body to the transverse process.
Project posterolaterally.
Lamina-part of the posterior arch
Meets in the midline to form the
bifid spinous process
Projects posteromedially and are
thin and slightly curved.
9.
10. Spinous process-short slender and
extend horizontally
The tip is bifurcated
Face superiorly and medially
The length of spinous process
decreases from c2-c3
C3-c5 remains constant
And undergoes a significant increase
at c7.
Vertebral foramen –is large and
triangular
11. Transverse process
They are peculiar in
orientation
They are hollowed in to
a gutter AP and they
point AL.
The posteromedial end
of the gutter lines the
intervertebral foramen.
The AL end is bifid
12. Articular processes-they bear
superior and inferior articular facets.
Superior facets face superiorly and
medially
Inferior facets face anteriorly and
laterally
13. Structure of a atypical cervical vertebra
Atlas /c1-its ring shaped
Transverse diameter greater than AP
diameter
Has two lateral faces oval in shape
running obliquely anteriorly and
medially
Which bear biconcave superior
articulate facet superiorly and medially
meant to articulate with occipital
condyles
14. Inferior articular facet –facing
inferiorly and medially
Convex AP
Corresponds to superior facet of axis
15. Anterior arch consist of small
cartilagenous oval shaped articular
facets for the odontoid process of axis
Posterior arch is initially flattened but
becomes thicker posteriorly to form
posterior tubercle on the midline.
Transeverse process
No spinous process
No intervertebral disc
16.
17. The axis-is atypicsl
Superior surface of the body carries
centrally the odomtoid process which
acts as a pivot for atlantoodontoid
joint .
Laterally possess 2 articular facets
facing superior and laterally
Facets are convex AP and flat
transversely
Posterior arch consist of narrow
laminae
18. The cartilage lined inferior articular
process corresponds to the superior
articular process of c3
Transverse process
19. The atlanto-axial joint complex
it is a plane synovial joint
comprises of 3 mechanically linked
joints
The central joint is the atlanto
odontoid joint
Two lateral joints-atlanto axial joint
20. Atlantoodointoid joint
it is synovial trochoid /pivot joint
Jointsurfaces-anterior articular facet
of odontoid and posterior articular
facet of the anterior arch of the
atlas
21. Movements at atlantoaxial and
atlanto
odontoid joint
Flexion-point of contact b/w two
convex surface moves forward
interspace of atlanto odontoid joint
opens superiorly
22.
23. Extention
Interspace of atlanto odontoid
jointopens inferiorly
Radiological findingas does not shoe
opening of interspaces
This is due to transverse ligament and
keeps the anterior arch and odontoid
process in close contact
During flxn and extn tha inferior
surface of atlas rols and sides over
superior articular surface of axis
24.
25. rotation
Left to right rotation-
The left lateral mass of
the atlas moves forward
Right lateral mass
recedes in rotation from
left to right and vice
versa from right to left
26.
27. Movement of atlanto occipital joint
Formed b/w superior articular
facets of atlas and the occipital
condyles.
It is an enarthodrial kind of joint
Gives 3 degrees of freedom
Axial rotation-about vertical axis
Flexion/extension-about
transverse axis
Lateral flexion-about AP axis.
28. flexion
The occipital condyles
recede on the lateral
masses of the atlas.
The occipital bone
moves away from the
posterior archof the
atlas
Limited by tension
developed in the
articular capsules and
29. extension
Occipital condyles
slides anteriorly on the
lateral masses of the
atlas.
Occipital bone moves
neatrer to the posterior
arch of the atlas
Posterior arch of the
atlas and axis are
approximated
30. Lateral flexion
Movement only occurs b/w c0-c1
and c2-c3
Left lateral flexion-slipping of
occipital condyles on right of atlas
Right lateral flexion-vice versa
Ther is asmall range of motion
Total ROM-C0-C3=8 degrees
C0-C1=3 degrees,C2-C3=5
degrees
31. rotation
When occiput rotates on atlas its
rotation is secondary to rotation of
atlas on axis
Around vertical axis passing
through the centre of odontoid
Causes right anterior displacement
of oright occipital condyle on right
lateral mass of the atlas
Lateral atlanto occipoital ligamenr is
32. Thus rotation of occiput to left is
associated with –
Linear displacement of 2-3 mm to the
left
Lateral flexion to the right
33. Movements at the lower cervical
vertebral column
Extension-ovrlying
vertebral body tilts and
slides posteriorly
IV space is compressed
posteriorly and opened
wide anteriorly
Nucleus palposus is driven
slightly anteriorly
Anterior fibers of annulus
fibrosus is streched
34. Superiorly articulating facet slides
inferiorly posteriorly and tilts posteriorly
Limited by anterior longitudinal ligament
and by the impact of the posterior
arches through ligaments
Flexion-upper vertebral body tilts and
slides anteriorly
Intervertebral space is compressed
anteriorly and opened wide posteriorly
Nucleus pulposus is driven posteriorly
35. Posterior fibres of
annulus fiberosus is
streched
Limited by the tension
developed in the
posterior longitudinal
ligament
By the capsular
ligament,ligamentum
36. Combined lateral flexion and
rotation-
Does not occur as pure motions
Governed by orientation of articular
facets which are oblique inferiorly and
posteriorly
Rotation is always coupeled with lateral
flexion
Considering the whole cervical column
from C2-T1 extension component is
37. Where as any movement b/w C6-C7
also adds up extension component
Thus three composite movement occurs
in 3 planes-
Lateral flexion –frontal plane
Extension-sagittal plane
Rotation-transverse plane
38. RANGE OF MOTION
JOINT COMBINED FLEXION ONE SIDE ONE SIDE
EXTENSION LAT BENDING AXIAL ROTATION
C2-C3 10 10 3
C3-C4 15 11 7
C4-C5 20 11 7
C5-C6 20 8 7
C6-C7 17 7 6
C7-T1 9 4 2
FROM- WHITE
39. stability
Cervical region bears less weoight
and are more mobile
Stability is provided by bony
configuration,muscles,ligamants
Muscles-flexion of head and
neck-
Depends on anterior muscles of the
neck
40. They are rectus capitis major, rectus
capitis minor
Longus cervicis which plays an
important role in straightening the cervical
column and holding it rigid
Scalene anterior posterior and medius
Suprahyoid and infrahyoid muscles
helps in supporting the cervical column at
rest
Thry are located at a distance from
cervical column
Thus acts via long arm of lever and are
41. Extension of head and neck-
Brought about by posterior neck
muscles
They are0-splenius
cervicis,semispinalis
cervicis,leavator
scapulae,transverso
spinalis,longismus
capiis,spenius capitis,trapezius
These muscles helps in
42. When contract unilaterally they
produce extension rotation and lateral
flexion on the same side
Both flexors and extensor group of
muscles are responsible to maintain
cervical column rigid in neutral
position
Essential in balancing the head and in
supporting weights carried on head
43.
44.
45. ligaments
Anterior atlnatoaxial
ligament,posterior atlantoaxial
ligament,tectorial
membrane,ligamentum nuchae
Transverse atlantal ligament-21.9
mm in length
Also refered as atlantal cruciform
ligament
Holds dense in closed
46.
47. Also serves as an articular surface for
dense
Prevents anterior displacement of C1
on C2
Alar ligaments-arise from axis on
either side of dens
Approx.1cm in legth
Are taut in flexion
Axial rotation of head and neck
tightens both alar ligaments
50. Biomechanics of cervical injury
WHIPLASH INJURY IS DUE TO HIT FROM
BEHIND CAUSING 1ST FORCED
EXTENSION OF THE NECK FOLLOWED BY
FOCED FLEXION OF THE NECK.
-2 PHAGES:
1)HYPEREXTENSION OF C5-C6 AND
MILD FLEXION AT C0-C4
2)HYPEREXTENSION OF THE
ENTIRE SPINE
-IF THE HEAD IS IN SLIGHT ROTATION THEN
BEFORE EXTENSION IS FORCED TO
FURTHER ROTATION CAUSING INJURY TO
51. LOWER CERVICAL FACET RESPOND WITH
SHEAR AND DISTRACTION MECHANISM IN
FRONT AND SHEAR AND COMPRESSION IN
THE BACK.
DUE TO THE INJURY CAUSE CHANGE IN
PIVOT POINT AT C5-C6 CAUSING JAMMING
OF THE INFERIOR FACET OF C5 AND
SUPERIOR FACET OF C6
C2-C3 FACET IS THE COMMON SITE FOR
THE PATIENTS WITH HEADACHE(60%) AND
C5-C6 IS THE SITE FOR REFFERED ARM
PAIN
52. Facet joint syndrome
FACET JOINT IS A SYNOVIAL JOINT AND
BETWEEN TWO FACET JOINT
CARTILAGENOUS DISC IS PRESENT,
DURING FACET LOCKING SYNOVIAL
MEMBRAME AND THE DISC GETS
ENTRAPPED BETWEEN TWO FACET
BONES.
PAIN IN SIDE FLEXION AND ROTATION TO
THE SAME SIDE AND EXTENSION AS
WELL.
COUPLING OF LATERAL FLEXION TO
ROTATION IS ALTERED DUE TO FACET
SYNDROME.
53.
54. - CERVICAL SPONDYLOSIS BEGINS WITH
CAPSULAR --RESTRICTION OF THE FACET
JOINTS WITHOUT BONY -CHANGES AND
GRADUALLY PROGRESS TO
CHARACTERISTIC FLATTENING,LIPPING
AND SPURRING OF THE VERTEBRAL BODY.
- ACCELERATED BY INJURY
- BONY STENOSIS OF INTERVERTEBRAL
FORAMEN IS POSSIBLE.
- LOWER CERVICAL SPINE WILL BE
KYPHOTIC
- ACTIVE ROTATION, LATERAL FLEXION TO
PAINFUL SIDE WILL BE RESTRICTED WITH
EXTENSION AS WELL.
- CAPSULAR RESTRICTION IN LOWER
CERVICAL AREA
55. - MOBILITY IN UPPER CERVICAL AREA IS
GENERALLY QUITE GOOD.
- OSTEOPHYTES STABILIZES THE
VERTEBRAL BODY ADJACENT TO THE
DEGENERATIVE DISC AND INCREASE
THE WT. BEARING SURFACE OF
VERTEBRAL END PLATES.
- CERVICAL MYELOGRAM SHOWS
SPONDYLOTIC CHANGE WITH
OSTEOPHYTIC CHANGE
56. Acute cervical injuries
The most common fracture mechanism in
cervical injuries is hyperflexion.
Anterior subluxation occurs when the
posterior ligaments rupture.
Since the anterior and middle columns remain
intact, this fracture is stable.
Simple wedge fracture is the result of a pure
flexion injury. The posterior ligaments remain
intact. Anterior wedging of 3mm or more
suggests fracture. Increased concavity along
with increased density due to bony impaction.
Usualy involves the upper endplate.
57. Unstable wedge fracture is an unstable
flexion injury due to damage to both the
anterior column (anterior wedge fracture) as
the posterior column (interspinous ligament).
Unilateral interfacet dislocation is due to
both flexion and rotation.
Bilateral interfacet dislocation is the result
of extreme flexion. BID is unstable and is
associated with a high incidence of cord
damage.
Flexion teardrop farcture is the result of
extreme flexion with axial loading. It is unstable
and is associated with a high incidence of cord
61. Axial compression injuries
Jefferson fracture is a burst fracture of the ring of
C1 with lateral displacement of both articular masses
.
Burst fracture at lower cervical level