This document defines posture and describes the different types of posture including static, dynamic, and abnormal postures. It discusses postural control and how it is maintained through various body systems. Key points of postural control include control of body orientation in space, maintaining center of gravity over base of support, and stabilizing the head. The document also examines postural strategies like fixed support synergies and changing support synergies that help restore equilibrium when perturbed. Sitting and lying postures are analyzed as well in terms of alignment and pressures on the spine.
This document discusses various aspects of human posture, including static and dynamic postures, the center of gravity, base of support, and synergies. It describes how the central nervous system interprets sensory inputs to maintain an upright posture through reactive and anticipatory responses. Factors that can alter inputs or outputs like injury or muscle atrophy are also discussed. The document covers external forces like gravity and ground reaction forces, as well as internal muscle forces, that maintain equilibrium. It examines postural sway and gravitational torques on body segments in standing.
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 analysis of posture including definitions, types of posture, and the key body structures and forces involved in maintaining posture. It discusses static and dynamic posture and defines the concepts of center of gravity, base of support, and line of gravity. It describes the various systems that contribute to postural control and different postural responses to perturbations. Finally, it analyzes posture in the sagittal plane and the forces acting on the ankle, knee, hip, and lumbosacral joint regions.
assessment of balance and management of balanceCharu Parthe
The document defines various concepts related to balance and exercise therapy. It discusses the center of mass, center of gravity, momentum, base of support, limits of stability, ground reaction forces, and center of pressure. It also describes the roles of the nervous system, musculoskeletal system, and environmental context in balance control. The main sensory systems involved in balance - visual, somatosensory, and vestibular - are defined. Different motor strategies for maintaining balance when perturbed are outlined, including ankle, weight-shift, suspension, and hip strategies. Stepping is mentioned as another strategy for large perturbations.
This document discusses postural control and balance. It defines key terms like static and dynamic balance, center of mass, center of gravity. It describes the different sensory systems, motor responses, and strategies involved in maintaining balance. Common balance impairments after stroke are described. Several clinical balance tests are mentioned. The principles of balance training include progressive challenge, use of feedback, and training functional tasks. Safety during balance training is also addressed.
This document provides an overview of posture biomechanics, including:
1. Definitions of static and dynamic posture, and descriptions of optimal sagittal and frontal plane alignment.
2. Explanations of how posture is controlled through sensory inputs, muscle activity, and strategies like fixed support and changing support.
3. Analyses of deviations from optimal posture, including positions of the foot, knee, spine, and effects of sitting and lying postures. Factors like age, gender, and occupation are also discussed.
Posture refers to the alignment of the body parts and is influenced by many factors. The spine has four curves - two primary curves in the posterior direction and two compensatory curves in the anterior direction. Good postural alignment involves maintaining a plumb line that passes through the body's surface landmarks. Posture is maintained through the interaction of the passive structures like bones and ligaments, active muscles, and neural control. Factors like age, pregnancy, occupation, handedness, muscle tightness/weakness, and obesity can impact one's posture. Developing good postural habits is important to avoid pain and dysfunction.
Posture - a perquisite for functional abilities in daily life. Posture is a combination of anatomy and physiology with inherent application of bio-mechanics and kinematics. Sitting, standing, walking are all functional activities depending on the ability of the body to support that posture to carry out each activity. Injuries and pathologies either postural or structural can massively change the bio-mechanics of posture and thus affect functional abilities.
This document discusses various aspects of human posture, including static and dynamic postures, the center of gravity, base of support, and synergies. It describes how the central nervous system interprets sensory inputs to maintain an upright posture through reactive and anticipatory responses. Factors that can alter inputs or outputs like injury or muscle atrophy are also discussed. The document covers external forces like gravity and ground reaction forces, as well as internal muscle forces, that maintain equilibrium. It examines postural sway and gravitational torques on body segments in standing.
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 analysis of posture including definitions, types of posture, and the key body structures and forces involved in maintaining posture. It discusses static and dynamic posture and defines the concepts of center of gravity, base of support, and line of gravity. It describes the various systems that contribute to postural control and different postural responses to perturbations. Finally, it analyzes posture in the sagittal plane and the forces acting on the ankle, knee, hip, and lumbosacral joint regions.
assessment of balance and management of balanceCharu Parthe
The document defines various concepts related to balance and exercise therapy. It discusses the center of mass, center of gravity, momentum, base of support, limits of stability, ground reaction forces, and center of pressure. It also describes the roles of the nervous system, musculoskeletal system, and environmental context in balance control. The main sensory systems involved in balance - visual, somatosensory, and vestibular - are defined. Different motor strategies for maintaining balance when perturbed are outlined, including ankle, weight-shift, suspension, and hip strategies. Stepping is mentioned as another strategy for large perturbations.
This document discusses postural control and balance. It defines key terms like static and dynamic balance, center of mass, center of gravity. It describes the different sensory systems, motor responses, and strategies involved in maintaining balance. Common balance impairments after stroke are described. Several clinical balance tests are mentioned. The principles of balance training include progressive challenge, use of feedback, and training functional tasks. Safety during balance training is also addressed.
This document provides an overview of posture biomechanics, including:
1. Definitions of static and dynamic posture, and descriptions of optimal sagittal and frontal plane alignment.
2. Explanations of how posture is controlled through sensory inputs, muscle activity, and strategies like fixed support and changing support.
3. Analyses of deviations from optimal posture, including positions of the foot, knee, spine, and effects of sitting and lying postures. Factors like age, gender, and occupation are also discussed.
Posture refers to the alignment of the body parts and is influenced by many factors. The spine has four curves - two primary curves in the posterior direction and two compensatory curves in the anterior direction. Good postural alignment involves maintaining a plumb line that passes through the body's surface landmarks. Posture is maintained through the interaction of the passive structures like bones and ligaments, active muscles, and neural control. Factors like age, pregnancy, occupation, handedness, muscle tightness/weakness, and obesity can impact one's posture. Developing good postural habits is important to avoid pain and dysfunction.
Posture - a perquisite for functional abilities in daily life. Posture is a combination of anatomy and physiology with inherent application of bio-mechanics and kinematics. Sitting, standing, walking are all functional activities depending on the ability of the body to support that posture to carry out each activity. Injuries and pathologies either postural or structural can massively change the bio-mechanics of posture and thus affect functional abilities.
Train the trainer class presentation 2019 ( week 3 biomechanics )fitnesscentral
This document provides an overview of biomechanics and human motion terminology in 3 parts:
1. It introduces biomechanics and the subfields of kinematics and kinetics. It describes different types of motion including rotary, translatory, and curvilinear.
2. It discusses fundamental movements in the sagittal, frontal, and transverse planes. It also covers anatomical locations and terminology used to describe human motion.
3. It explains forces including motive, resistive, and isometric muscle actions. It discusses the roles of agonists, antagonists, and synergists. It concludes with the importance of stability and mobility in different parts of the body.
This document discusses various aspects of posture including definitions of different types of posture, muscle involvement in maintaining posture, postural reflexes, factors affecting posture, and descriptions and causes of some common postural deviations like kyphosis, lordosis, scoliosis, etc. Key points include:
- Posture is the body position maintained by muscle activity and reflexes in response to stimuli from muscles, eyes, ears and joints. Both static and dynamic posture involve integration of postural reflexes.
- Good posture allows maximum efficiency with minimal effort while poor posture causes unnecessary muscle strain and reduces function.
- Common postural deviations include kyphosis (rounded back), lordosis (swayback), and scoliosis
This document discusses the biomechanics of posture. It defines posture as the relative arrangement of body parts in relation to gravity. There are static and dynamic types of posture. The biomechanics of posture involves analyzing the kinetics and kinematics of all body segments. Perfect posture reduces stress on muscles and joints. However, the erect human posture is less stable than quadrupedal postures due to a smaller base of support and the location of the center of gravity being further from the base. Proper balance and control of posture depends on compensating for forces from gravity and maintaining stability of individual body segments and the whole body.
Human posture is influenced by mechanical, anatomical, and physiological factors. A good posture protects the body from injury by maintaining balanced alignment. It differs between individuals based on their body type and environment. Posture is dynamic and changes with body position and movement throughout life. It involves control systems to counteract gravity and stabilize body segments during both static and dynamic activities.
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.
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. It discusses perturbations that can disrupt posture and the compensatory muscle synergies and strategies used to regain equilibrium, such as ankle and hip synergies. The document also covers kinetics of posture involving forces like inertia, gravity and ground reaction forces. It analyzes optimal posture and deviations, and describes various postural abnormalities.
Posture is maintained through a balance of muscle contractions regulated by reflexes. The key reflex is the stretch reflex, where muscle spindles detect changes in muscle length and signal the spinal cord to contract or relax muscles. There are two types of postural reflexes - static and statokinetic. Static reflexes maintain posture against gravity, while statokinetic reflexes allow for voluntary movement. Multiple areas of the central nervous system integrate these reflexes, including the spinal cord, brainstem, cerebellum and cerebral cortex. Vision and vestibular signals also provide important inputs. Together this network allows humans to maintain an upright stance through low levels of continuous muscle contraction adjusted by reflexes.
Posture is maintained through a combination of muscle tone and reflexes. The muscles that maintain posture contain a high proportion of slow-twitch fibers to allow for sustained contraction. Postural reflexes integrate inputs from proprioceptors, the vestibular system and visual system to make continuous corrections to muscle activity and maintain balance. The spinal cord, brainstem and cerebellum are involved in regulating these reflexes. Upright human posture relies on minimal muscle activity but reflex adjustments of antigravity muscles in response to sway to oppose the effects of gravity.
This document discusses posture and postural alignment. It defines posture and recognizes the importance of maintaining proper spinal curves and alignment with gravity. The document outlines the objectives of understanding posture, identifies the types of posture, and discusses the factors that can affect posture like age, pregnancy, muscle imbalances, and occupations. It also differentiates the muscles of the spine and explores methods of assessing posture, including X-rays, 3D motion analysis, raster stereography, and physical measurements.
This document describes a case study of a 15-year-old male patient with 55-degree thoracic kyphosis, chronic lumbar pain, and other postural deviations who was treated with Global Postural Reeducation (RPG). RPG aims to correct morphology and relieve pain through muscle lengthening techniques. After treatment, the patient's thoracic kyphosis decreased by 16 degrees and his lumbar pain was relieved, demonstrating the effectiveness of RPG for treating thoracic kyphosis and its related issues.
Kin191 A. Ch.3. Assessment Of Posture. Fall 2007JLS10
The document discusses posture and its clinical evaluation. It defines posture and ideal alignment, and describes the kinetic chain and muscle functions like agonist/antagonist relationships. It also covers common postural deviations in the feet, knees, spine, shoulders, and head, and how to inspect and palpate posture clinically. Postural deviations can include hyperlordosis, kyphosis, swayback, flat back, scoliosis, forward shoulders, scapular winging, and a forward head.
1) The sit-to-stand movement involves raising the body from a sitting to standing position and requires coordination of limbs to transfer weight while maintaining balance.
2) Individuals with knee osteoarthritis display different movement strategies during sit-to-stand, such as greater muscle co-contraction, earlier hamstring activation, and reduced hip and knee range of motion.
3) Altered movement strategies in osteoarthritis are thought to compensate for pain and weakness, helping to accomplish the task while protecting the affected knee joint.
The document describes the structure and function of the spine. It discusses the following key points:
- The spine consists of 33 vertebrae divided into 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 3-4 coccygeal vertebrae connected by intervertebral discs.
- The spine allows for six degrees of motion: flexion, extension, lateral bending, rotation, anterior/posterior shear, and compression/distraction.
- Deep segmental muscles like the multifidus control segmental motion while global muscles like the erector spinae produce motion across segments.
- Common faulty spinal postures include lordosis, kyphosis, scoliosis, sway back
The document discusses functional core stabilization and chronic musculoskeletal pain caused by muscle imbalances and weaknesses in the core musculature. It notes that a comprehensive core stabilization program should be included in all lower extremity rehabilitation programs. It describes the anatomy and functions of the core musculature including the lumbo-pelvic-hip complex and how weaknesses can lead to compensation patterns and overuse or chronic injuries.
The document discusses the structure and function of the spine and factors that influence posture. It details the 33 vertebrae and their arrangement into curves. Proper posture depends on balance between the spine's passive (bones/ligaments), active (muscles), and neural control systems. Muscle endurance, limb positioning, breathing, and intra-abdominal pressure all impact spinal stability and alignment. Maintaining stability requires anticipatory muscle activation in response to forces.
Locomotion which means gait is controlled by various systems. Janda described these systems in three different linkages; articular, muscular and neural. The slide show also, describes in the same the locomotion control as described by Janda in brief.
Kinesiology is the study of human and nonhuman animal-body movements, performance, and function by applying the sciences of biomechanics, anatomy, physiology, psychology, and neuroscience.
gait cycle gait kinematic and pathological gait.pptxSwatiTiwari865509
The document discusses gait and gait analysis. It defines gait as a series of rhythmic movements that result in forward body progression. A gait cycle is defined as the period from one heel strike to the next on the same foot. The gait cycle consists of stance and swing phases for each foot. Stance phase accounts for 60% of the cycle and swing for 40%. Gait examination involves observing the patient at rest, during static posture, and walking to identify asymmetries, deformities, or impairments affecting gait pattern and mechanics. Key points of observation include foot progression, knee alignment, pelvic and shoulder positioning, arm swing, and cadence.
Interferential therapy (IFT) is a transcutaneous electrical stimulation technique developed in the 1950s. It involves applying two medium frequency alternating currents intersecting in the tissues at a low frequency. This produces amplitude modulation and generates a low frequency current for therapeutic purposes. IFT uses higher frequencies than TENS which allows for a more comfortable and tolerable penetration through the skin. It works by modulating the amplitude of the medium frequency currents applied through static, dynamic or bipolar interference methods. The physiological effects include pain relief, muscle stimulation, increased blood flow and edema reduction. Precautions must be taken with certain medical conditions and electrode placement is important.
Train the trainer class presentation 2019 ( week 3 biomechanics )fitnesscentral
This document provides an overview of biomechanics and human motion terminology in 3 parts:
1. It introduces biomechanics and the subfields of kinematics and kinetics. It describes different types of motion including rotary, translatory, and curvilinear.
2. It discusses fundamental movements in the sagittal, frontal, and transverse planes. It also covers anatomical locations and terminology used to describe human motion.
3. It explains forces including motive, resistive, and isometric muscle actions. It discusses the roles of agonists, antagonists, and synergists. It concludes with the importance of stability and mobility in different parts of the body.
This document discusses various aspects of posture including definitions of different types of posture, muscle involvement in maintaining posture, postural reflexes, factors affecting posture, and descriptions and causes of some common postural deviations like kyphosis, lordosis, scoliosis, etc. Key points include:
- Posture is the body position maintained by muscle activity and reflexes in response to stimuli from muscles, eyes, ears and joints. Both static and dynamic posture involve integration of postural reflexes.
- Good posture allows maximum efficiency with minimal effort while poor posture causes unnecessary muscle strain and reduces function.
- Common postural deviations include kyphosis (rounded back), lordosis (swayback), and scoliosis
This document discusses the biomechanics of posture. It defines posture as the relative arrangement of body parts in relation to gravity. There are static and dynamic types of posture. The biomechanics of posture involves analyzing the kinetics and kinematics of all body segments. Perfect posture reduces stress on muscles and joints. However, the erect human posture is less stable than quadrupedal postures due to a smaller base of support and the location of the center of gravity being further from the base. Proper balance and control of posture depends on compensating for forces from gravity and maintaining stability of individual body segments and the whole body.
Human posture is influenced by mechanical, anatomical, and physiological factors. A good posture protects the body from injury by maintaining balanced alignment. It differs between individuals based on their body type and environment. Posture is dynamic and changes with body position and movement throughout life. It involves control systems to counteract gravity and stabilize body segments during both static and dynamic activities.
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.
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. It discusses perturbations that can disrupt posture and the compensatory muscle synergies and strategies used to regain equilibrium, such as ankle and hip synergies. The document also covers kinetics of posture involving forces like inertia, gravity and ground reaction forces. It analyzes optimal posture and deviations, and describes various postural abnormalities.
Posture is maintained through a balance of muscle contractions regulated by reflexes. The key reflex is the stretch reflex, where muscle spindles detect changes in muscle length and signal the spinal cord to contract or relax muscles. There are two types of postural reflexes - static and statokinetic. Static reflexes maintain posture against gravity, while statokinetic reflexes allow for voluntary movement. Multiple areas of the central nervous system integrate these reflexes, including the spinal cord, brainstem, cerebellum and cerebral cortex. Vision and vestibular signals also provide important inputs. Together this network allows humans to maintain an upright stance through low levels of continuous muscle contraction adjusted by reflexes.
Posture is maintained through a combination of muscle tone and reflexes. The muscles that maintain posture contain a high proportion of slow-twitch fibers to allow for sustained contraction. Postural reflexes integrate inputs from proprioceptors, the vestibular system and visual system to make continuous corrections to muscle activity and maintain balance. The spinal cord, brainstem and cerebellum are involved in regulating these reflexes. Upright human posture relies on minimal muscle activity but reflex adjustments of antigravity muscles in response to sway to oppose the effects of gravity.
This document discusses posture and postural alignment. It defines posture and recognizes the importance of maintaining proper spinal curves and alignment with gravity. The document outlines the objectives of understanding posture, identifies the types of posture, and discusses the factors that can affect posture like age, pregnancy, muscle imbalances, and occupations. It also differentiates the muscles of the spine and explores methods of assessing posture, including X-rays, 3D motion analysis, raster stereography, and physical measurements.
This document describes a case study of a 15-year-old male patient with 55-degree thoracic kyphosis, chronic lumbar pain, and other postural deviations who was treated with Global Postural Reeducation (RPG). RPG aims to correct morphology and relieve pain through muscle lengthening techniques. After treatment, the patient's thoracic kyphosis decreased by 16 degrees and his lumbar pain was relieved, demonstrating the effectiveness of RPG for treating thoracic kyphosis and its related issues.
Kin191 A. Ch.3. Assessment Of Posture. Fall 2007JLS10
The document discusses posture and its clinical evaluation. It defines posture and ideal alignment, and describes the kinetic chain and muscle functions like agonist/antagonist relationships. It also covers common postural deviations in the feet, knees, spine, shoulders, and head, and how to inspect and palpate posture clinically. Postural deviations can include hyperlordosis, kyphosis, swayback, flat back, scoliosis, forward shoulders, scapular winging, and a forward head.
1) The sit-to-stand movement involves raising the body from a sitting to standing position and requires coordination of limbs to transfer weight while maintaining balance.
2) Individuals with knee osteoarthritis display different movement strategies during sit-to-stand, such as greater muscle co-contraction, earlier hamstring activation, and reduced hip and knee range of motion.
3) Altered movement strategies in osteoarthritis are thought to compensate for pain and weakness, helping to accomplish the task while protecting the affected knee joint.
The document describes the structure and function of the spine. It discusses the following key points:
- The spine consists of 33 vertebrae divided into 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 3-4 coccygeal vertebrae connected by intervertebral discs.
- The spine allows for six degrees of motion: flexion, extension, lateral bending, rotation, anterior/posterior shear, and compression/distraction.
- Deep segmental muscles like the multifidus control segmental motion while global muscles like the erector spinae produce motion across segments.
- Common faulty spinal postures include lordosis, kyphosis, scoliosis, sway back
The document discusses functional core stabilization and chronic musculoskeletal pain caused by muscle imbalances and weaknesses in the core musculature. It notes that a comprehensive core stabilization program should be included in all lower extremity rehabilitation programs. It describes the anatomy and functions of the core musculature including the lumbo-pelvic-hip complex and how weaknesses can lead to compensation patterns and overuse or chronic injuries.
The document discusses the structure and function of the spine and factors that influence posture. It details the 33 vertebrae and their arrangement into curves. Proper posture depends on balance between the spine's passive (bones/ligaments), active (muscles), and neural control systems. Muscle endurance, limb positioning, breathing, and intra-abdominal pressure all impact spinal stability and alignment. Maintaining stability requires anticipatory muscle activation in response to forces.
Locomotion which means gait is controlled by various systems. Janda described these systems in three different linkages; articular, muscular and neural. The slide show also, describes in the same the locomotion control as described by Janda in brief.
Kinesiology is the study of human and nonhuman animal-body movements, performance, and function by applying the sciences of biomechanics, anatomy, physiology, psychology, and neuroscience.
gait cycle gait kinematic and pathological gait.pptxSwatiTiwari865509
The document discusses gait and gait analysis. It defines gait as a series of rhythmic movements that result in forward body progression. A gait cycle is defined as the period from one heel strike to the next on the same foot. The gait cycle consists of stance and swing phases for each foot. Stance phase accounts for 60% of the cycle and swing for 40%. Gait examination involves observing the patient at rest, during static posture, and walking to identify asymmetries, deformities, or impairments affecting gait pattern and mechanics. Key points of observation include foot progression, knee alignment, pelvic and shoulder positioning, arm swing, and cadence.
Interferential therapy (IFT) is a transcutaneous electrical stimulation technique developed in the 1950s. It involves applying two medium frequency alternating currents intersecting in the tissues at a low frequency. This produces amplitude modulation and generates a low frequency current for therapeutic purposes. IFT uses higher frequencies than TENS which allows for a more comfortable and tolerable penetration through the skin. It works by modulating the amplitude of the medium frequency currents applied through static, dynamic or bipolar interference methods. The physiological effects include pain relief, muscle stimulation, increased blood flow and edema reduction. Precautions must be taken with certain medical conditions and electrode placement is important.
Therapeutic currents are classified into low, medium, and high frequency currents. Low frequency currents vary from 1-1000Hz and stimulate sensory and motor nerves. Examples include faradic current (30-70Hz), TENS (1-120Hz), and HVPGS (500V twin pulses). Medium frequency currents include interferential current and Russian current (2.5kHz burst modulated at 50Hz). Therapeutic currents have physiological effects like muscle stimulation and contraction as well as therapeutic effects such as muscle strengthening, nerve stimulation, and pain relief.
Faradic current is a short duration, interrupted electrical current used for muscle stimulation. It produces asymmetrical, biphasic waveforms. Faradic currents are surged to produce near-normal tetanic muscle contractions and relaxations. They are produced via a circuit consisting of two parallel triode valves. Faradic currents stimulate motor nerves to cause muscle contraction if the intensity is high enough. They are used diagnostically and therapeutically for conditions like muscle weakness and nerve damage. Proper application and parameters are important to achieve benefits while avoiding dangers like burns.
Biomechanics is the study of the mechanical aspects of living organisms, including the forces generated by muscles and external forces like gravity. It has sub-branches that study motion with and without forces, like kinematics which describes motion, and kinetics which studies the forces behind motion. Biomechanists seek to answer questions like what types of exercises astronauts should do in space to preserve bone mass, what lifting techniques minimize low back stress, and how sprinters dominate through optimal running technique. Biomechanics research uses both qualitative observations and quantitative measurements involving numbers and formulas.
Ultrasound therapy uses high frequency sound waves to generate heat deep in tissues for therapeutic purposes. A generator sets the ultrasound frequency between 1-3 MHz, with higher frequencies penetrating less deeply. Pulsed ultrasound is safer as it allows time for heat to dissipate between pulses. Non-thermal effects include cavitation, acoustic streaming, and micromassage. Ultrasound promotes healing in acute injuries by stimulating inflammatory responses and collagen synthesis. It helps remodel scar tissue and accelerate wound healing in chronic injuries by increasing membrane permeability. Common uses are for varicose ulcers, pressure sores, pain relief in herpes zoster and back pain. Moving the transducer head prevents heat build up and damage from standing waves.
Ultrasound therapy uses high frequency sound waves to treat various medical conditions. It can be used for diagnosis, tissue destruction, and therapy. The document discusses ultrasound frequencies used in physiotherapy between 0.75-3.3 MHz, with deeper penetration at lower frequencies. It also covers the production of ultrasound waves using piezoelectric crystals, their propagation through tissues based on density and velocity, and how varying the voltage controls intensity.
Bone is a living tissue that provides structure, protection, and movement. There are two types of bone formation: intramembranous, where bone forms within connective tissue, and endochondral, where bone replaces cartilage. Bones are composed of cells, organic components like collagen, and inorganic minerals. Bone tissue is continuously remodeled through the actions of osteoblasts which form bone and osteoclasts which resorb bone. Bones adapt and change their structure in response to mechanical stresses through Wolff's law.
This document provides an introduction to biomechanics. It begins by stating the objectives of understanding basic biomechanics terms and concepts. It then defines biomechanics as the application of mechanical principles to living organisms. Specifically, it is the study of biological structures, processes and functions through the lens of mechanics.
The document outlines some key areas of biomechanics including kinematics, kinetics, arthrokinematics and osteokinematics. Kinematics describes motion without forces, while kinetics examines the causes of motion including forces. Arthrokinematics and osteokinematics refer to motion between joint surfaces and bones respectively. Examples of open and closed kinetic chains are provided. The importance of understanding biomechanics for clinical applications is also highlighted.
This document provides an introduction to biomechanics, which is the study of forces acting on the human body and the effects produced by these forces. Biomechanics uses principles of anatomy and physics to describe and analyze human movement. It examines kinematics, which describes motion without reference to forces, and kinetics, which examines the causes of motion including internal and external forces. Biomechanics has applications in areas like sports science, ergonomics, rehabilitation, and prosthetics. The document outlines various biomechanical concepts including rigid body mechanics, segmental analysis, and different types of motion. It also discusses methods of acquiring biomechanical data like video analysis.
This document discusses basic biomechanics concepts including mechanics, kinematics, kinetics, and how the musculoskeletal system functions as a series of simple machines. It describes how levers, wheels, and axles are used to create mechanical advantages that enhance force, range of motion, or speed of movement. It provides examples of the three classes of levers and how the relationship between the force arm, axis, and resistance arm determines torque requirements.
Osteoporosis - Definition , Evaluation and Management .pdfJim Jacob Roy
Osteoporosis is an increasing cause of morbidity among the elderly.
In this document , a brief outline of osteoporosis is given , including the risk factors of osteoporosis fractures , the indications for testing bone mineral density and the management of osteoporosis
Promoting Wellbeing - Applied Social Psychology - Psychology SuperNotesPsychoTech Services
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
share - Lions, tigers, AI and health misinformation, oh my!.pptxTina Purnat
• Pitfalls and pivots needed to use AI effectively in public health
• Evidence-based strategies to address health misinformation effectively
• Building trust with communities online and offline
• Equipping health professionals to address questions, concerns and health misinformation
• Assessing risk and mitigating harm from adverse health narratives in communities, health workforce and health system
TEST BANK For An Introduction to Brain and Behavior, 7th Edition by Bryan Kol...rightmanforbloodline
TEST BANK For An Introduction to Brain and Behavior, 7th Edition by Bryan Kolb, Ian Q. Whishaw, Verified Chapters 1 - 16, Complete Newest Versio
TEST BANK For An Introduction to Brain and Behavior, 7th Edition by Bryan Kolb, Ian Q. Whishaw, Verified Chapters 1 - 16, Complete Newest Version
TEST BANK For An Introduction to Brain and Behavior, 7th Edition by Bryan Kolb, Ian Q. Whishaw, Verified Chapters 1 - 16, Complete Newest Version
Adhd Medication Shortage Uk - trinexpharmacy.comreignlana06
The UK is currently facing a Adhd Medication Shortage Uk, which has left many patients and their families grappling with uncertainty and frustration. ADHD, or Attention Deficit Hyperactivity Disorder, is a chronic condition that requires consistent medication to manage effectively. This shortage has highlighted the critical role these medications play in the daily lives of those affected by ADHD. Contact : +1 (747) 209 – 3649 E-mail : sales@trinexpharmacy.com
These lecture slides, by Dr Sidra Arshad, offer a quick overview of the physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar lead (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
6. Describe the flow of current around the heart during the cardiac cycle
7. Discuss the placement and polarity of the leads of electrocardiograph
8. Describe the normal electrocardiograms recorded from the limb leads and explain the physiological basis of the different records that are obtained
9. Define mean electrical vector (axis) of the heart and give the normal range
10. Define the mean QRS vector
11. Describe the axes of leads (hexagonal reference system)
12. Comprehend the vectorial analysis of the normal ECG
13. Determine the mean electrical axis of the ventricular QRS and appreciate the mean axis deviation
14. Explain the concepts of current of injury, J point, and their significance
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. Chapter 3, Cardiology Explained, https://www.ncbi.nlm.nih.gov/books/NBK2214/
7. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Integrating Ayurveda into Parkinson’s Management: A Holistic ApproachAyurveda ForAll
Explore the benefits of combining Ayurveda with conventional Parkinson's treatments. Learn how a holistic approach can manage symptoms, enhance well-being, and balance body energies. Discover the steps to safely integrate Ayurvedic practices into your Parkinson’s care plan, including expert guidance on diet, herbal remedies, and lifestyle modifications.
8 Surprising Reasons To Meditate 40 Minutes A Day That Can Change Your Life.pptxHolistified Wellness
We’re talking about Vedic Meditation, a form of meditation that has been around for at least 5,000 years. Back then, the people who lived in the Indus Valley, now known as India and Pakistan, practised meditation as a fundamental part of daily life. This knowledge that has given us yoga and Ayurveda, was known as Veda, hence the name Vedic. And though there are some written records, the practice has been passed down verbally from generation to generation.
Basavarajeeyam is a Sreshta Sangraha grantha (Compiled book ), written by Neelkanta kotturu Basavaraja Virachita. It contains 25 Prakaranas, First 24 Chapters related to Rogas& 25th to Rasadravyas.
2. DEFINITION
Posture can be defined as the
relative arrangement of
different parts of the body with
line of gravity.
Each structure contributes to
equilibrium and stability of body
in optimal standing position.
3.
4. TYPES OF POSTURE
Humans have the ability to arrange and
rearrange body segments to form a large variety
of postures. ( Erect bipedal stance )
STATIC POSTURE :
The body and its segments are aligned and
maintained in certain positions.
Examples : standing, sitting, lying, and kneeling.
DYNAMIC POSTURE :
postures in which the body or its segments are
moving
Examples : walking, running, jumping, throwing,
and lifting.
5. POSTURAL CONTROL
It is the persons ability to maintain-stability of
body and body segments in response to forces that
disturb the body’s structural equilibrium
Postural control depends on integrity of CNS,
visual, vestibular, and musculoskeletal system.
It also depends on information from receptors
located in and around joints and from sole of foot.
Reactive responses –reactions to external that
displaces body COM
Proactive response—internally generated
destabilizing forces
Example :rising arms to catch a ball
6. MAJOR GOAL AND BASIC ELEMENTS OF
CONTROL
Major goals :
Control body’s orientation in space
Maintain body’s COG and BOS
Stabilize the head vertically –eye gaze is
appropriately oriented
Elements of control :
CNS is able to detect instability and respond to
the input with appropriate output to maintain
equilibrium of body.
Musculoskeletal system have ROM for
responding to specific tasks
Muscles able to respond with appropriate
speed and forces.
7. ABSENT OR ALTERED INPUTS :
o When inputs are altered , control
system respond to incomplete data and
posture may be altered .
Example : foot “FALLEN ASLEEP”.
ALTERED OUT PUTS :
o Inability of muscles to respond to appropriately
to signals from CNS.
o Example : sedentary elderly persons .
8. MUSCLE SYNERGIES
“PERTURBATION” is any sudden change in
conditions that displaces the body posture
away from equilibrium .
perturbation
SENSORY MECHANICAL
(Altering of visual (displacements-movements
input) of body segment or entire
body [COM to BOS ])
Postural response to perturbations caused by
either platform or by pushes or pulls are called
REACTIVE or COMPENSATORY response.
9. SYNERGIES
Fixed support synergies
Change in support synergies
Head supporting strategies
The postural responses are called SYNERGIES
or STRATEGIES
10. FIXED SUPPORT SYNERGIES:
Pattern of muscle activity in which the BOS
remains fixed during the perturbation and
recovery of equilibrium.
Stability is regained through movements of
parts of the body but ,the feet remains fixed
on BOS.
EXAMPLES: Ankle synergy ,Hip synergy
ANKLE SYNERGY:
It consists of discrete bursts of muscle activity
on either the anterior or posterior aspects of
the body that occur in response to forward and
backward movements of the supporting
platform .
Muscle activity from distal to proximal pattern.
11. ANKLE SYNERGY
Anterior (forward)
movement of platform
Posterior (backward)
movement of body---
displacement of body’s
LOG posterior to BOS.
Activation of dorsiflexors,
hip flexors, abdominal
muscles, neck flexors
LOG back over BOS
STABILITY
12. ANTERIOR PERTURBATION
Posterior movement of
platform
Anterior movement of
body----displacement
of body’s LOG anterior
over BOS
Activation of plantar
flexors ,hip extensors
, back and neck
extensors
LOG back over BOS --
---STABILITY
13. HIP SYNERGY
It consists discrete bursts of muscle activity
in a proximal-to-distal pattern of activation.
Fixed-support hip synergy may be used
primarily in situations in which change-in-
support strategies (stepping or grasping
synergies) are not possible
14. CHANGE-IN-SUPPORT SYNERGIES
Strategies include stepping
(forward, backward, or
sidewise) and grasping (using
one’s hands to grab a bar or
other fixed support) in response
to movements of the platform.
Maintains stability in instance
of large perturbations.
Tether-release system.
Backward movement of platform,
person uses steeping strategy to
keep from falling forward .it brings
body’s COM over a new BOS.
15. HEAD STABILIZING STRATEGIES
Proactive strategy occur in anticipation of
initiation of internally generated forces caused by
change in position from sitting to standing.
Used in dynamic equilibrium situation.
Example : maintain head during walking.
Vertical stability of head is maintained by two
types of strategies
HEAD STABILIZATION IN SPACE (HSS):
Modification of head position in anticipation of
displacements of body COG.
HEAD STABILIZATION ON TRUNK (HST):
Head and trunk move as a single unit.
16. KINETICS AND KINEMATICS OF POSTURE
In response to perturbations, active internal
forces employed to counteract the external forces
that affect the equilibrium and stability of the
body in the erect standing posture.
External forces : Inertia, Gravity and ground
reaction forces (GRF’S)
Internal forces : Muscle activity, passive tension
in ligaments, tendons, joint capsules and other
soft tissue structures .
INERTIA: In erect standing posture body undergoes
a constant swaying motion called postural sway
or way envelop (4inches b/w feet—12 in sagittal
plane ,16 in frontal plane)
GRAVITY: Forces acts downward from body’s COG
(LOG falls within BOS)
17. GROUND REACTION FORCES :
When ever body contacts the ground , the ground
pushes back on body (GRF )
Vector representing it is called GRFV.
GRF have 3 component forces
1 vertical component force
2 horizontal component forces
- Medial and lateral direction
- Anterior and posterior direction
GRFV is equal in magnitude but opposite in direction
to GF in erect standing posture
The point of application of GRFV is at body’s centre of
pressure (COP)
COP is located in foot in unilateral stance and b/w feet
in bilateral stance.
18. COINCIDENT ACTION LINES :
GRFV and LOG have coincident action lines
in static erect posture.
It help to analysis of effect of these forces
on body segments.
External and Internal movements:
LOG passes at a distance from axis, an
external gravitational moment is created
and it causes rotation of superimposed
body segments around that joint axis
unless it opposed by counterbalancing
internal moment (muscle contraction).
19. OPTIMAL POSTURE
An ideal posture is one in which the body segments are
aligned vertically and LOG passes through all the joint
axes
Normal body structures makes it impossible to achieve,
but is possible to attain a posture, close to ideal one
In normal standing posture ,the LOG falls close to, but
not through most jt. axes -Compressive forces are
distributed over the weight bearing surfaces of joints; no
excessive tension exerted on ligamentous or required
muscles
Analysis of Posture from side view:
Analysis of posture involves identification of the location of
body segments relative to the LOG
Body segments-either side of LOG- symmetrical
A plumb line is used to represent the LOG
Postural analysis may be performed using; Radiography,
photography, EMG, electro goniometry, force plates, 3-
dimensional computer analysis
21. ANALYSIS OF KNEE IN SIDE VIEW
KNEE :
LOG passes anterior to midline of knee and posterior to patella.
22. HIP AND PELVIS ANALYSIS IN SIDE VIEW
LOG passes slightly posterior to axis of hip joint, through
greater trochanter leads to posterior pelvic tilt on femoral
head.
25. ANALYSIS OF
VERTEBRAL COLUMN
Optimal position of plum line
through midline of trunk.
At cervical- LOG posterior,
extension
At thoracic- LOG anterior,
flexion
At lumbar- LOG posterior,
extension
27. Deviations from optimal alignment
view from side
Foot and Toes:- Claw toes
Hammer toes
Knee:- Flexed Knee Posture -Genu Recurvatum
Pelvis:-Excessive Anterior Pelvic Tilt
Excessive posterior pelvic tilt
Vertebral column:- Lordosis
Kyphosis
Head:- Forward Head Posture
28. CLAW TOES :
Hyperextension of MTP joint, flexion of PIP and DIP joints.
Callus (thickening of epidermis )Formation on dorsal aspect of
flexed phalanges. Affects all toes (2nd through 5th)
Hammer Toe :
Deformity-hyperextension of MTP and DIP joints - flexion of PIP
joint.
Callus on superior surface of PIP joints
29. FLEXED KNEE POSTURE
This stance is maintained by
increased activity by
quadriceps, gastrocnemius,
soleus, and hip extensors
30. GENU RECURVATUM
The hyper extended knee
posture, LOG locates anteriorly,
puts the posterior joint capsule
under tension stress and
lengthening of posterior capsule,
cruciate ligament.
Anterior compression leads to
degenerative changes of
cartilaginous joint surface.
31. PELVIS
Excessive Anterior Pelvic
Tilt
Excessive Posterior
Pelvic Tilt
Straightening of lumbar
spine and loss of
flexibility and also loss
its ability to withstand
high load.
32. VERTEBRAL COLUMN
Kyphosis: It refers to an abnormal
increase in the normal posterior
convexity of the thoracic vertebral
column.
Two types :
Gibbus Hump Back is a deformity that
may occur as result of TB. It forms a
sharp posterior angulation in the upper
thoracic region of vertebral column
Dowager’s Hump is found in post-
menopausal women with osteoporosis.
Anterior aspect of bodies of series of
vertebra collapse due to osteoporotic
weakening and therefore, increase in
posterior convexity of thoracic area
Lordosis: It refers to an abnormal
increase in the normal anterior
convexities of either the cervical or
lumbar regions of the vertebral column
33. HEAD
Forward head posture :
Anterior location LOG ,increases flexion
movement this leads to increase constant
isometric muscle tension to support forward
head posture
Compression of posterior zygapophyseal joints
and posterior intervertebral disc and
narrowing of intervertebral foramen in
lordotic areas of cervical region.
38. PES PLANUS (FLAT FOOT )
Reduced or absent MEDIAL LONGITUDINAL ARCH,
which may be either rigid or flexible
Talar head-displaced-anterior, medial, inferior
and causes depression of navicular bone and
plantar calcaneonavicular (spring) ligament, and
lengthening of tibialis posterior muscle
Navicular lies below the Feiss line and may even
rest on the floor in severe conditions
39. RIGID FLAT FOOT
It is a structural deformity where the medial
longitudinal arch of foot is absent in NWB,WB
and toe standing
The arch is reduced during normal weight
bearing, but reappears during toe standing and
non weight bearing
FLEXIBLE FLAT FOOT
40. PES CAVUS
The medial longitudinal arch of foot may be
unusually high
A high arch is called pes cavus
It is a more stable position of foot than pes
planus
Weight borne on lateral borders of foot
Lateral ligament and peroneus longus
muscle stretched
41. KNEES
GENU VALGUM (Knock knees)
Mechanical axes of lower extremities are
displaced laterally and patella may be
displaced laterally
If genu valgum exceeds 30° (50 to 70 ) persists
beyond 8yrs of age – structural changes occur
Medial knee joint structures – abnormal
tensile or distraction stress
Lateral knee joint Structures – abnormal
compressive stress
42. GENU VARUM (Bow legs )
Knees are widely separated when the feet
are together and malleoli touches.
Cortical thickening on medial concavity –
on femur and tibia due to increased
compressive force
Patella may be displaced medially
Causes—vit D deficiency, renal rickets ,
osteochondritis.
44. Idiopathic scoliosis are categorized by age
infantile (0 to 3yrs ),
juvenile (4 to 10yrs),
adolescent (older than 10yrs)
45.
46. ANALYSIS OF SITTING
POSTURES
Sitting postures are more complex than
standing postures.
The same gravitational moments as in
standing posture must be considered,
The contact forces that are created when
various portions of the body interface with
various parts of chairs, such as head, back,
and foot rests, and seats.
48. MUSCLE ACTIVITY IN SITTING
POSTURES
Static erect posture: LOG close to joint axis in head
and spine
Slumped posture : LOG passes anterior to joint axis
Slouched posture : LOG passes posterior to joint axis
Flexion relaxation phenomenon helps to less muscle
activity in slouched posture than active erect sitting.
Muscles activity help in sitting posture-superficial
lumbar multifidus, thoracic erector spinae, internal
oblique abdominal muscles
49. Intervertebral disc pressure and
compressive loads on spine
IVD pressure is measured by creep phenomenon
Compressive force by calculating muscle activity
with electromyography
Flexed sitting posture is more harmful than
extend sitting posture
Because in kyphosis sitting increased
intervertebral disc shear force
Posterior annulus tensile force and anterior
anulus load, hydrostatic force in nucleus and
load on posterior ligaments
50. Seat interface pressures
Contact forces between persons body and seat are called seat
interface pressure
Measured by sensory-containing mats
Force per unit are measured by pascals
Individuals with physical disabilities (paraplegia), thin elderly
persons have higher pressure
Wheel-chair users have high tension, compression, shear forces
in gluteus muscles
Less muscle thickness under ischial tuberosity in elders
These measurements help to prevent pressure sores
To reduce seat interface pressure
Change the posture of body-forward and lateral trunk flexion
Alteration in angulation of chairs back rest
Using cushions (synthetic material, water, air, gel)reduces stress
Cushion thickness should be up to 8cm is useful
51. ANALYSIS OF LYING POSTURE
Interdiscal pressures are less in lying posture
than in standing and sitting postures.
Interdiscal pressures in supine lying (0.10 mpA)
were less than in either lying prone (0.11 mpA)
or lying on the side (0.12 mpA).
Some pressure-reducing mattress surfaces
include foam, air, gas, water and gel.
Other pressure-relieving surfaces include
movable surfaces, usually powered by a motor
or pump, which can alternatively inflate and
deflate.