this presentation describes the detail anatomy of Temporo-mandibular joint with respect to its articulating surfaces, ligaments, muscles and blood and nerve supply.
The external carotid artery arises from the third aortic arch during embryonic development. It supplies structures in the front of the neck and face. It gives off 8 branches including the superior thyroid, lingual, and facial arteries. The superior thyroid artery supplies the thyroid gland. The lingual artery has three parts and supplies structures of the tongue. Ligation of the lingual artery is done by exposing it in the digastric triangle after dividing the hyoglossus muscle.
This seminar explains about the development, relations, ligaments, various attachments, vascular and nervous supply and various surgical approaches and its modifications to TMJ
The mandible is the largest and strongest bone of the face. It develops from the first pharyngeal arch and consists of a body with alveolar, inferior and mylohyoid borders, and a ramus with coronoid and condylar processes. The mandible undergoes both prenatal and postnatal growth, with the condyle showing considerable activity as the mandible grows downward and forward. Key parts include the body, ramus, coronoid process, and condylar process. The mandible articulates with the temporal bone at the temporomandibular joint.
This document provides an overview of the temporomandibular joint (TMJ). It begins by defining the TMJ as the joint connecting the mandible to the skull and regulating mandibular movement. It then describes the different types of joints in the body before focusing on the specifics of the TMJ. Key points include that the TMJ is a complex synovial joint that allows for both hinging and gliding movements. An articular disc separates the condyle of the mandible and fossa of the temporal bone. The document outlines the development, structures, innervation, vascularization and biomechanics of the TMJ.
The hyoglossus muscle originates from the body and greater horn of the hyoid bone and inserts into the inferior aspects of the lateral part of the tongue. It functions to depress the tongue, especially pulling its sides inferiorly, and helps shorten or retrude the tongue. The hyoglossus is innervated by the hypoglossal nerve and supplied by branches of the lingual and facial arteries.
The document provides an overview of the temporomandibular joint (TMJ), including its anatomy, components, development, function, and age-related changes. Key points include:
- The TMJ is a synovial joint that permits hinge and gliding movements of the mandible and involves the condyle of the mandible articulating with the temporal bone.
- Its main components are the mandibular condyle, glenoid fossa, articular disc, articular capsule, synovial membrane, and ligaments.
- It develops from Meckel's cartilage and functions in speech, mastication, and deglutition.
- Age-related changes include fl
this presentation describes the detail anatomy of Temporo-mandibular joint with respect to its articulating surfaces, ligaments, muscles and blood and nerve supply.
The external carotid artery arises from the third aortic arch during embryonic development. It supplies structures in the front of the neck and face. It gives off 8 branches including the superior thyroid, lingual, and facial arteries. The superior thyroid artery supplies the thyroid gland. The lingual artery has three parts and supplies structures of the tongue. Ligation of the lingual artery is done by exposing it in the digastric triangle after dividing the hyoglossus muscle.
This seminar explains about the development, relations, ligaments, various attachments, vascular and nervous supply and various surgical approaches and its modifications to TMJ
The mandible is the largest and strongest bone of the face. It develops from the first pharyngeal arch and consists of a body with alveolar, inferior and mylohyoid borders, and a ramus with coronoid and condylar processes. The mandible undergoes both prenatal and postnatal growth, with the condyle showing considerable activity as the mandible grows downward and forward. Key parts include the body, ramus, coronoid process, and condylar process. The mandible articulates with the temporal bone at the temporomandibular joint.
This document provides an overview of the temporomandibular joint (TMJ). It begins by defining the TMJ as the joint connecting the mandible to the skull and regulating mandibular movement. It then describes the different types of joints in the body before focusing on the specifics of the TMJ. Key points include that the TMJ is a complex synovial joint that allows for both hinging and gliding movements. An articular disc separates the condyle of the mandible and fossa of the temporal bone. The document outlines the development, structures, innervation, vascularization and biomechanics of the TMJ.
The hyoglossus muscle originates from the body and greater horn of the hyoid bone and inserts into the inferior aspects of the lateral part of the tongue. It functions to depress the tongue, especially pulling its sides inferiorly, and helps shorten or retrude the tongue. The hyoglossus is innervated by the hypoglossal nerve and supplied by branches of the lingual and facial arteries.
The document provides an overview of the temporomandibular joint (TMJ), including its anatomy, components, development, function, and age-related changes. Key points include:
- The TMJ is a synovial joint that permits hinge and gliding movements of the mandible and involves the condyle of the mandible articulating with the temporal bone.
- Its main components are the mandibular condyle, glenoid fossa, articular disc, articular capsule, synovial membrane, and ligaments.
- It develops from Meckel's cartilage and functions in speech, mastication, and deglutition.
- Age-related changes include fl
The temporomandibular joint (TMJ) is a bilateral joint that allows for hinge-like and gliding motions of the mandible. It is formed between the head of the mandible and the articular fossa of the temporal bone. The TMJ is unique in that it contains an articular disc that divides the joint cavity into upper and lower compartments. Common functions of the TMJ include mastication and speech. Temporomandibular disorders (TMD) refer to a group of medical conditions involving the muscles of mastication and TMJ. Major etiological factors for TMD include occlusal condition, trauma, emotional stress, deep pain input, and parafunctional activities.
This document provides an overview of the anatomy of the mandible. It discusses the parts and features of the mandible, including the body, ramus, condylar process and coronoid process. It describes the ossification, attachments, blood supply, nerve supply and age-related changes of the mandible. Key points covered include the mandible ossifying from Meckel's cartilage, its attachments to muscles like the masseter and temporalis, the inferior alveolar artery and nerve supplying it, and how its shape changes with age with tooth eruption and absorption.
The temporomandibular joint is the joint of the jaw and is frequently referred to as TMJ. The TMJ is a bilateral synovial articulation between the mandible and temporal bone. The name of the joint is derived from the two bones which form the joint: the upper temporal bone which is part of the cranium (skull), and the lower jawbone or mandible.
There are six main components of the TMJ.
Mandibular condyles
Articular surface of the temporal bone
Capsule
Articular disc
Ligaments
Lateral pterygoid
The temporomandibular joint (TMJ) is a bilateral synovial joint that connects the mandible to the temporal bone. It has several unique features, including an articular disc that divides the joint into two compartments. The TMJ is innervated by the auriculotemporal nerve and receives its blood supply from branches of the external carotid artery. Common disorders of the TMJ include myofascial pain, derangements of the disc-condyle complex, and inflammatory conditions like arthritis. Treatment for TMJ disorders focuses on conservative and reversible therapies.
The cavernous sinus is a pair of venous channels located on each side of the body of the sphenoid bone in the middle cranial fossa. It is approximately 2 cm long and 1 cm wide. Several important structures pass through or are located within the cavernous sinus, including the internal carotid artery, cranial nerves III, IV, V1, and VI, and the inferior hypophyseal arteries. The cavernous sinus drains into various venous channels including the superior and inferior petrosal sinuses, which connect to the transverse sinus and internal jugular vein. Cavernous sinus thrombosis is a potential complication caused by sepsis that can spread from the face or paranasal sinuses,
This document provides an overview of the anatomy of the maxilla bone. It discusses the key features and structures of the maxilla, including its processes, surfaces, foramina, and articulations. It also covers the development, age-related changes, and surgical anatomy of the maxilla. Common types of maxillary fractures are also listed. In summary, the maxilla is described as the second largest facial bone that forms the upper jaw and contributes to other structures. Its main processes, surfaces, and articulations are defined along with relevant anatomical landmarks.
This document provides an overview of a seminar on the development and anatomy of the temporomandibular joint (TMJ). It discusses the evolution of the TMJ from primitive vertebrates to humans. The embryology of the TMJ is described, including the development of the primary and secondary jaw joints. The classification of joints and types of synovial joints are defined. Finally, the key anatomical structures of the TMJ are outlined, including the condylar head, glenoid fossa, articular eminence, muscles of mastication, articular disc, joint capsule, ligaments and blood supply.
The document provides an overview of the anatomy, development, and surgical anatomy of the temporomandibular joint (TMJ). It discusses the key components of the TMJ, including the mandibular condyle, articular surfaces of the temporal bone, articular disc, fibrous capsule, and ligaments. It describes the development of the TMJ from two distinct blastemas beginning in the 7th week in utero. The document highlights several unique features of the TMJ, such as its articular surface being covered by fibrocartilage instead of hyaline cartilage. It also reviews the movements, vascular supply, innervation, and age-related changes of the TMJ.
The document provides an overview of the arteries of the face. It notes that the face is supplied by branches of the external carotid artery including the facial artery, transverse facial artery, and maxillary artery. It also discusses the internal carotid artery and its terminal branch, the ophthalmic artery, which gives off the zygomaticofacial and dorsal nasal arteries that supply parts of the face. The anastomoses between the branches of the external and internal carotid arteries are mentioned as well.
The applied anatomy of temporomandibular joint has many significant applications in maxillofacial surgery. Understanding these important anatomic relations- variations enables surgeons to perform the surgical procedures safely. Knowledge of these concepts helps us to recognize the problems and complications as and when they occur and manage them accordingly.
The ophthalmic nerve is the smallest of the three divisions of the trigeminal nerve. It arises from the upper part of the semi lunar ganglion and passes forward along the lateral wall of the cavernous sinus before dividing into three branches - the lacrimal, frontal, and nasociliary nerves. These branches innervate sensory structures of the eye, upper face, and nasal cavity. The ophthalmic nerve also transmits parasympathetic fibers that control functions of the iris, ciliary muscle, and lacrimal gland.
The document summarizes the anatomy of the face, including:
1. The boundaries and skin of the face, which is very vascular and contains sebaceous glands and sweat glands.
2. The superficial fascia of the face contains the muscles of facial expression and fat.
3. The muscles of facial expression are divided into groups that control the scalp, eyelids, nose, mouth, and neck. These muscles are innervated by the facial nerve.
4. The arteries, veins, lymphatics, and nerves that supply the structures of the face.
This document provides an overview of the mandible, including its development, anatomy, age-related changes, and clinical applications. It discusses how the mandible develops from the first pharyngeal arch and ossifies through both intramembranous and endochondral bone formation. The anatomy of the mandible is described in detail, including its various parts and structures. Age-related changes to the mandible from birth through adulthood and old age are also reviewed. Finally, the document discusses some applied clinical aspects of the mandible relating to dislocations, fractures, and considerations for surgery.
The maxillary artery arises from the external carotid artery and divides into three parts - the mandibular, pterygoid, and pterygopalatine parts. It supplies structures in the face like the maxilla and mandible. The maxillary artery and its branches anastomose with other vessels and are clinically significant for conditions like nosebleeds, epidural hematomas, and complications during procedures like Le Fort I osteotomies when the branches can be injured. Precise surgical techniques are important to avoid damaging branches like the descending palatine artery.
facial nerve is the 7th cranial nerve. it supplies the parts of the face and also the muscles of mastication. it helps in the expression of the face too.
This document provides an overview of the trigeminal nerve (CN V), including its nuclei, functional components, course and distribution, the trigeminal ganglion, and the three divisions of the trigeminal nerve - ophthalmic, maxillary, and mandibular nerves. It describes the sensory and motor nuclei of the trigeminal nerve in the brainstem and discusses the sensory and motor roots. It also outlines the anatomy and branches of the three divisions of the trigeminal nerve.
The document discusses the external carotid artery, its branches, and ligation. It begins with an introduction and overview of the embryological development of the external carotid artery. It then describes the common carotid arteries and their course in the neck. It discusses the bifurcation of the common carotid artery and structures located there - the carotid sinus and carotid body. The external carotid artery is then described in detail, including its course, branches, and relations. The branches discussed include the superior thyroid, lingual, facial, occipital, posterior auricular, ascending pharyngeal, maxillary, and superficial temporal arteries. Indications for ligation and surgical approaches are provided at the end.
hypoglossal nerve, origin course an termination of hypoglossal nerve, function of hypoglossal nerve, clinical examination of hypoglossal nerve, hypoglossal nerve palsy
The facial artery arises from the external carotid artery in the carotid triangle. It has two parts - the cervical part and facial part. The cervical part passes beneath muscles in the neck before curving upward over the mandible. The facial part enters the face and runs tortuously upward across the cheek, along the side of the nose, and ends at the medial corner of the eye. It supplies structures of the face, palate, and nose and is accompanied by the facial vein throughout its course.
The temporomandibular joint (TMJ) allows movement of the mandible for speech and chewing. It is located on each side of the head between the temporal bone and mandible. The TMJ is a complex synovial joint that contains articular surfaces covered by fibrocartilage. An articular disc divides the joint cavity into upper and lower compartments. Various ligaments and muscles work together to enable movements like depression, elevation, protraction, and retraction of the mandible. Disorders of the TMJ can cause conditions like dislocation of the mandible or ankylosis.
The document summarizes the muscles of mastication. It describes the origin, insertion, innervation, blood supply, actions, and clinical importance of the major muscles - masseter, temporalis, medial pterygoid, and lateral pterygoid. It also discusses the development of the muscles, their role in mastication, deglutition and speech, investigations used to study the masticatory system, and disorders that can affect the muscles of mastication.
The temporomandibular joint (TMJ) is a bilateral joint that allows for hinge-like and gliding motions of the mandible. It is formed between the head of the mandible and the articular fossa of the temporal bone. The TMJ is unique in that it contains an articular disc that divides the joint cavity into upper and lower compartments. Common functions of the TMJ include mastication and speech. Temporomandibular disorders (TMD) refer to a group of medical conditions involving the muscles of mastication and TMJ. Major etiological factors for TMD include occlusal condition, trauma, emotional stress, deep pain input, and parafunctional activities.
This document provides an overview of the anatomy of the mandible. It discusses the parts and features of the mandible, including the body, ramus, condylar process and coronoid process. It describes the ossification, attachments, blood supply, nerve supply and age-related changes of the mandible. Key points covered include the mandible ossifying from Meckel's cartilage, its attachments to muscles like the masseter and temporalis, the inferior alveolar artery and nerve supplying it, and how its shape changes with age with tooth eruption and absorption.
The temporomandibular joint is the joint of the jaw and is frequently referred to as TMJ. The TMJ is a bilateral synovial articulation between the mandible and temporal bone. The name of the joint is derived from the two bones which form the joint: the upper temporal bone which is part of the cranium (skull), and the lower jawbone or mandible.
There are six main components of the TMJ.
Mandibular condyles
Articular surface of the temporal bone
Capsule
Articular disc
Ligaments
Lateral pterygoid
The temporomandibular joint (TMJ) is a bilateral synovial joint that connects the mandible to the temporal bone. It has several unique features, including an articular disc that divides the joint into two compartments. The TMJ is innervated by the auriculotemporal nerve and receives its blood supply from branches of the external carotid artery. Common disorders of the TMJ include myofascial pain, derangements of the disc-condyle complex, and inflammatory conditions like arthritis. Treatment for TMJ disorders focuses on conservative and reversible therapies.
The cavernous sinus is a pair of venous channels located on each side of the body of the sphenoid bone in the middle cranial fossa. It is approximately 2 cm long and 1 cm wide. Several important structures pass through or are located within the cavernous sinus, including the internal carotid artery, cranial nerves III, IV, V1, and VI, and the inferior hypophyseal arteries. The cavernous sinus drains into various venous channels including the superior and inferior petrosal sinuses, which connect to the transverse sinus and internal jugular vein. Cavernous sinus thrombosis is a potential complication caused by sepsis that can spread from the face or paranasal sinuses,
This document provides an overview of the anatomy of the maxilla bone. It discusses the key features and structures of the maxilla, including its processes, surfaces, foramina, and articulations. It also covers the development, age-related changes, and surgical anatomy of the maxilla. Common types of maxillary fractures are also listed. In summary, the maxilla is described as the second largest facial bone that forms the upper jaw and contributes to other structures. Its main processes, surfaces, and articulations are defined along with relevant anatomical landmarks.
This document provides an overview of a seminar on the development and anatomy of the temporomandibular joint (TMJ). It discusses the evolution of the TMJ from primitive vertebrates to humans. The embryology of the TMJ is described, including the development of the primary and secondary jaw joints. The classification of joints and types of synovial joints are defined. Finally, the key anatomical structures of the TMJ are outlined, including the condylar head, glenoid fossa, articular eminence, muscles of mastication, articular disc, joint capsule, ligaments and blood supply.
The document provides an overview of the anatomy, development, and surgical anatomy of the temporomandibular joint (TMJ). It discusses the key components of the TMJ, including the mandibular condyle, articular surfaces of the temporal bone, articular disc, fibrous capsule, and ligaments. It describes the development of the TMJ from two distinct blastemas beginning in the 7th week in utero. The document highlights several unique features of the TMJ, such as its articular surface being covered by fibrocartilage instead of hyaline cartilage. It also reviews the movements, vascular supply, innervation, and age-related changes of the TMJ.
The document provides an overview of the arteries of the face. It notes that the face is supplied by branches of the external carotid artery including the facial artery, transverse facial artery, and maxillary artery. It also discusses the internal carotid artery and its terminal branch, the ophthalmic artery, which gives off the zygomaticofacial and dorsal nasal arteries that supply parts of the face. The anastomoses between the branches of the external and internal carotid arteries are mentioned as well.
The applied anatomy of temporomandibular joint has many significant applications in maxillofacial surgery. Understanding these important anatomic relations- variations enables surgeons to perform the surgical procedures safely. Knowledge of these concepts helps us to recognize the problems and complications as and when they occur and manage them accordingly.
The ophthalmic nerve is the smallest of the three divisions of the trigeminal nerve. It arises from the upper part of the semi lunar ganglion and passes forward along the lateral wall of the cavernous sinus before dividing into three branches - the lacrimal, frontal, and nasociliary nerves. These branches innervate sensory structures of the eye, upper face, and nasal cavity. The ophthalmic nerve also transmits parasympathetic fibers that control functions of the iris, ciliary muscle, and lacrimal gland.
The document summarizes the anatomy of the face, including:
1. The boundaries and skin of the face, which is very vascular and contains sebaceous glands and sweat glands.
2. The superficial fascia of the face contains the muscles of facial expression and fat.
3. The muscles of facial expression are divided into groups that control the scalp, eyelids, nose, mouth, and neck. These muscles are innervated by the facial nerve.
4. The arteries, veins, lymphatics, and nerves that supply the structures of the face.
This document provides an overview of the mandible, including its development, anatomy, age-related changes, and clinical applications. It discusses how the mandible develops from the first pharyngeal arch and ossifies through both intramembranous and endochondral bone formation. The anatomy of the mandible is described in detail, including its various parts and structures. Age-related changes to the mandible from birth through adulthood and old age are also reviewed. Finally, the document discusses some applied clinical aspects of the mandible relating to dislocations, fractures, and considerations for surgery.
The maxillary artery arises from the external carotid artery and divides into three parts - the mandibular, pterygoid, and pterygopalatine parts. It supplies structures in the face like the maxilla and mandible. The maxillary artery and its branches anastomose with other vessels and are clinically significant for conditions like nosebleeds, epidural hematomas, and complications during procedures like Le Fort I osteotomies when the branches can be injured. Precise surgical techniques are important to avoid damaging branches like the descending palatine artery.
facial nerve is the 7th cranial nerve. it supplies the parts of the face and also the muscles of mastication. it helps in the expression of the face too.
This document provides an overview of the trigeminal nerve (CN V), including its nuclei, functional components, course and distribution, the trigeminal ganglion, and the three divisions of the trigeminal nerve - ophthalmic, maxillary, and mandibular nerves. It describes the sensory and motor nuclei of the trigeminal nerve in the brainstem and discusses the sensory and motor roots. It also outlines the anatomy and branches of the three divisions of the trigeminal nerve.
The document discusses the external carotid artery, its branches, and ligation. It begins with an introduction and overview of the embryological development of the external carotid artery. It then describes the common carotid arteries and their course in the neck. It discusses the bifurcation of the common carotid artery and structures located there - the carotid sinus and carotid body. The external carotid artery is then described in detail, including its course, branches, and relations. The branches discussed include the superior thyroid, lingual, facial, occipital, posterior auricular, ascending pharyngeal, maxillary, and superficial temporal arteries. Indications for ligation and surgical approaches are provided at the end.
hypoglossal nerve, origin course an termination of hypoglossal nerve, function of hypoglossal nerve, clinical examination of hypoglossal nerve, hypoglossal nerve palsy
The facial artery arises from the external carotid artery in the carotid triangle. It has two parts - the cervical part and facial part. The cervical part passes beneath muscles in the neck before curving upward over the mandible. The facial part enters the face and runs tortuously upward across the cheek, along the side of the nose, and ends at the medial corner of the eye. It supplies structures of the face, palate, and nose and is accompanied by the facial vein throughout its course.
The temporomandibular joint (TMJ) allows movement of the mandible for speech and chewing. It is located on each side of the head between the temporal bone and mandible. The TMJ is a complex synovial joint that contains articular surfaces covered by fibrocartilage. An articular disc divides the joint cavity into upper and lower compartments. Various ligaments and muscles work together to enable movements like depression, elevation, protraction, and retraction of the mandible. Disorders of the TMJ can cause conditions like dislocation of the mandible or ankylosis.
The document summarizes the muscles of mastication. It describes the origin, insertion, innervation, blood supply, actions, and clinical importance of the major muscles - masseter, temporalis, medial pterygoid, and lateral pterygoid. It also discusses the development of the muscles, their role in mastication, deglutition and speech, investigations used to study the masticatory system, and disorders that can affect the muscles of mastication.
The document discusses the muscles of mastication. There are 4 primary muscles - masseter, temporalis, lateral pterygoid, and medial pterygoid. These muscles develop from the first brachial arch and are innervated by the mandibular nerve. They work together to power the chewing cycle and move the mandible during opening, closing, and side-to-side motions. Secondary muscles like the digastric, mylohyoid, and geniohyoid can assist during difficult chewing. Conditions like tetanus and bruxism are also reviewed.
The document summarizes key anatomical structures and biomechanics of the temporomandibular joint (TMJ). It describes the TMJ's articular surfaces, discs, ligaments, blood supply, innervation, and the muscles involved in mastication. It discusses the different movements of the mandible during opening/closing, translation, and grinding. Clinical considerations include disc displacement and dislocation of the TMJ.
This document provides an overview of the temporomandibular joint (TMJ), including its:
- Types (synovial, bicondylar, ginglymoarthroidal)
- Anatomy (bones, articular disc, ligaments, muscles)
- Histology of the articular surfaces
- Biomechanics and functions like opening and closing the mouth
- Age-related changes like flattening of bones and thinning of tissues
This document provides an overview of the anatomy, components, relations, blood supply, nerve supply, muscles, and age changes of the temporomandibular joint (TMJ). It discusses the bony and soft tissue structures of the TMJ, including the condyle, glenoid fossa, articular eminence, articular disc, ligaments, and synovial fluid. It also describes the muscles associated with TMJ function and common symptoms and findings associated with TMJ disorders.
This document provides an overview of the anatomy, biomechanics, and clinical assessment of the temporomandibular joint (TMJ). It describes the unique features of the TMJ, including its bilateral function and fibrocartilage covering. The key anatomical structures are defined, including the articular disc, joint capsule, ligaments, and masticatory muscles. The biomechanics of opening, closing, and lateral movements are explained. Methods for clinically evaluating the TMJ are outlined, such as assessing range of motion, palpating the joint and muscles, and identifying sounds like clicks or crepitus. Diagnostic aids including MRI, CT, and electromyography are also mentioned.
This document discusses the muscles of mastication. It begins by defining mastication and describing the development of muscles from embryonic tissues. The primary muscles of mastication - masseter, temporalis, lateral pterygoid, and medial pterygoid - are then described in detail, including their origins, insertions, nerve/blood supply, and actions. Secondary muscles like the digastric, mylohyoid, and geniohyoid that assist in mastication are also outlined. The document concludes that the masticatory system requires precise muscle movement to effectively move the teeth during function.
This document summarizes the muscles of mastication. It describes the four primary muscles - temporalis, masseter, lateral pterygoid, and medial pterygoid muscles. It discusses their embryology, blood supply, nerve innervation, actions, and clinical significance. A study found that around 26.8% of participants seeking dental care reported temporomandibular disorder pain. The muscles of mastication are important for chewing food and moving the jaw. Disorders can include pain, dysfunction, and infections or tumors in the mastication space.
Muscles of mastication deepak final copyDeepak Kakde
The document discusses the muscles of mastication. It describes the four primary muscles - masseter, temporalis, lateral pterygoid, and medial pterygoid. It details the origin, insertion, nerve supply and actions of each muscle. It also discusses the secondary muscles that assist in mastication, including the digastric, mylohyoid and geniohyoid muscles. Finally, it covers some clinical considerations regarding diseases and disorders that can affect the muscles of mastication.
10. triangles of neck, tmj & applied anatomy[1]MBBS IMS MSU
The temporomandibular joint consists of anterior and posterior triangles. The anterior triangle includes the digastric, submental, carotid, and muscular triangles. The posterior triangle includes the occipital and supraclavicular triangles. The temporomandibular joint is a synovial joint that connects the mandible to the temporal bone. It allows hinge-like opening and closing of the mouth as well as gliding movements, facilitated by muscles of mastication.
The document discusses the anatomy and surgical approaches of the temporomandibular joint (TMJ). It begins with the introduction and then describes the anatomy of the TMJ in detail, including its cranial and mandibular components, capsule, ligaments, articular disk, blood supply, nerve supply and movements. It then discusses various surgical approaches to the mandibular condyle and neck, such as the postauricular, endaural, submandibular, postramal, preauricular and coronal approaches. The preauricular approach is considered the most basic and standard while the coronal approach provides the most extensive access.
This document discusses the muscles of mastication. It describes the principal muscles - masseter, temporalis, medial pterygoid, and lateral pterygoid - and their origins, insertions, nerve supply and actions. It also briefly discusses the accessory muscles of mastication and some clinical conditions involving the muscles of mastication, such as trismus, bruxism, myofascial pain syndrome, and temporal tendonitis. The development, palpation and applied aspects of the individual muscles are explained. References used are also listed.
This document provides an overview of the anatomy and physiology of the temporomandibular joint (TMJ). It describes the development, components, ligaments, vascularization, innervation and relationships of the TMJ. The key components discussed include the articular disc, condyle, articular eminence, glenoid fossa, capsule and ligaments. The functions of synovial fluid in lubrication and the receptors and nerves involved in proprioception are also summarized.
The temporomandibular joint (TMJ) is a complex joint that connects the mandible to the temporal bone. It is composed of the articular disc, articular surfaces, ligaments, and muscles. The TMJ is unique in that it allows for both rotational and translational movements. Common disorders of the TMJ include dislocations, ankylosis, and temporomandibular joint dysfunction syndrome. Radiographic views like the transcranial and transorbital views are used to evaluate the TMJ.
Relationship of tmj anatomy and pathology and relatedDr. AJAY SRINIVAS
This document provides an overview of the temporomandibular joint (TMJ) anatomy and associated neuromuscular disorders. It begins with an introduction to the TMJ as a compound synovial joint, then describes the bony and soft tissue components of the TMJ. This includes the glenoid fossa, condylar head, articular eminence, articular disc, joint capsule, ligaments, innervation and blood supply. It also discusses the muscles of mastication - masseter, temporalis, lateral and medial pterygoid muscles. The document concludes with sections on TMJ imaging, disorders and the use of orthodontics in temporomandibular disorder treatment.
This document provides an overview of the temporomandibular joint (TMJ). It begins with definitions and characteristic features, then describes the development, relations, components and movements of the TMJ. It discusses age-related changes to the joint and common disorders like temporomandibular disorders. It also briefly outlines radiographic views, investigations and treatments related to the TMJ. The overall purpose is to provide an anatomical and clinical understanding of the TMJ for dentists and clinicians.
The temporomandibular joint (TMJ) is a synovial joint that connects the mandible to the temporal bone of the skull. It has two compartments - the upper compartment allows translational movement and the lower compartment allows rotational movement. The TMJ has a unique articular disc that separates the two compartments and allows for both types of movement. Common disorders of the TMJ include disc displacement, myofascial pain dysfunction syndrome, and degenerative joint disease. Diagnosis involves imaging like x-rays, MRI or CT scans. Treatment focuses on rest, analgesics, heat therapy, and avoiding strain on the jaw.
This document provides an overview of the temporomandibular joint (TMJ). It describes the TMJ as a complex synovial joint divided into upper and lower cavities by the articular disc. The disc attaches to surrounding ligaments and muscles that facilitate jaw movement. The TMJ receives innervation from nerves and blood supply from surrounding arteries. Common TMJ disorders include disc displacement, where the disc is abnormally positioned, and myofascial pain involving discomfort in the jaw muscles.
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Dive into an in-depth exploration of the histological structure of female reproductive system with this comprehensive lecture. Presented by Dr. Ayesha Irfan, Assistant Professor of Anatomy, this presentation covers the Gross anatomy and functional histology of the female reproductive organs. Ideal for students, educators, and anyone interested in medical science, this lecture provides clear explanations, detailed diagrams, and valuable insights into female reproductive system. Enhance your knowledge and understanding of this essential aspect of human biology.
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
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.
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
Muktapishti is a traditional Ayurvedic preparation made from Shoditha Mukta (Purified Pearl), is believed to help regulate thyroid function and reduce symptoms of hyperthyroidism due to its cooling and balancing properties. Clinical evidence on its efficacy remains limited, necessitating further research to validate its therapeutic benefits.
Here is the updated list of Top Best Ayurvedic medicine for Gas and Indigestion and those are Gas-O-Go Syp for Dyspepsia | Lavizyme Syrup for Acidity | Yumzyme Hepatoprotective Capsules etc
Cell Therapy Expansion and Challenges in Autoimmune DiseaseHealth Advances
There is increasing confidence that cell therapies will soon play a role in the treatment of autoimmune disorders, but the extent of this impact remains to be seen. Early readouts on autologous CAR-Ts in lupus are encouraging, but manufacturing and cost limitations are likely to restrict access to highly refractory patients. Allogeneic CAR-Ts have the potential to broaden access to earlier lines of treatment due to their inherent cost benefits, however they will need to demonstrate comparable or improved efficacy to established modalities.
In addition to infrastructure and capacity constraints, CAR-Ts face a very different risk-benefit dynamic in autoimmune compared to oncology, highlighting the need for tolerable therapies with low adverse event risk. CAR-NK and Treg-based therapies are also being developed in certain autoimmune disorders and may demonstrate favorable safety profiles. Several novel non-cell therapies such as bispecific antibodies, nanobodies, and RNAi drugs, may also offer future alternative competitive solutions with variable value propositions.
Widespread adoption of cell therapies will not only require strong efficacy and safety data, but also adapted pricing and access strategies. At oncology-based price points, CAR-Ts are unlikely to achieve broad market access in autoimmune disorders, with eligible patient populations that are potentially orders of magnitude greater than the number of currently addressable cancer patients. Developers have made strides towards reducing cell therapy COGS while improving manufacturing efficiency, but payors will inevitably restrict access until more sustainable pricing is achieved.
Despite these headwinds, industry leaders and investors remain confident that cell therapies are poised to address significant unmet need in patients suffering from autoimmune disorders. However, the extent of this impact on the treatment landscape remains to be seen, as the industry rapidly approaches an inflection point.
Local Advanced Lung Cancer: Artificial Intelligence, Synergetics, Complex Sys...Oleg Kshivets
Overall life span (LS) was 1671.7±1721.6 days and cumulative 5YS reached 62.4%, 10 years – 50.4%, 20 years – 44.6%. 94 LCP lived more than 5 years without cancer (LS=2958.6±1723.6 days), 22 – more than 10 years (LS=5571±1841.8 days). 67 LCP died because of LC (LS=471.9±344 days). AT significantly improved 5YS (68% vs. 53.7%) (P=0.028 by log-rank test). Cox modeling displayed that 5YS of LCP significantly depended on: N0-N12, T3-4, blood cell circuit, cell ratio factors (ratio between cancer cells-CC and blood cells subpopulations), LC cell dynamics, recalcification time, heparin tolerance, prothrombin index, protein, AT, procedure type (P=0.000-0.031). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and N0-12 (rank=1), thrombocytes/CC (rank=2), segmented neutrophils/CC (3), eosinophils/CC (4), erythrocytes/CC (5), healthy cells/CC (6), lymphocytes/CC (7), stick neutrophils/CC (8), leucocytes/CC (9), monocytes/CC (10). Correct prediction of 5YS was 100% by neural networks computing (error=0.000; area under ROC curve=1.0).
Local Advanced Lung Cancer: Artificial Intelligence, Synergetics, Complex Sys...
MUSCLES OF MASTICATION & TEMPOROMANDIBULAR JOINT
1.
2.
3. TEMPORAL &
INFRATEMPORAL FOSSA
• Temporal fossa :extends
above by the sup.temporal
line and below by zygomatic
arch.
• Infratemporal fossa : lies
beneath the base of the skull,
between the pharynx
(medially) & ramus of
mandible (laterally).
4. CONTENTS OF THE TEMPORAL
FOSSA
1-Temporalis muscle
2-Temporal fascia covers
temporalis muscle, attached
above to sup.temporal line and
below to upper border of
zygomatic arch.
3-Deep temporal nerves from
the ant. division of mandibular
N., emerge from upper border
of lateral pterygoid, enter the
deep surface of temporalis .
5. 4-Auriculotemporal
nerve arise from the
posterior division of
mandibular N. It emerges
from upper border of
parotid gland ,
It lies behind superficial
temporal artery & TMJ,
in front of the
auricle.
It supplies skin of
auricle , ext.auditory meatus
and the scalpe over the
temporal region.
6. 5-Superficial
temporal artery
It is a terminal branch of
ext.carotid artery.
It Emerges from upper
border of parotid gland,
behind T.M.J.
It crosses root of zygomatic
arch in front of auriculo-
temporal N. & auricle ,here its
pulsation can be easily felt.
7. CONTENTS OF INFRATEMPORAL
FOSSA
Lateral & medial
pterygoid muscles
(muscles of mastication)
Branches of the
mandibular N.
Otic ganglion.
Chorda tympani.
Maxillary artery.
Pterygoid venous plexus.
8.
9. INRODUCTION
MASTICATION is a process by which food is
made into small particles, this function is done
by muscles of mastication and temporo
mandibular joint.
There are 4 types of muscles of mastication
1 Temporalis
2 Masseter
3 Medial Pterygoid
4 Lateral Pterygoid.
10. TEMPORALIS
FAN SHAPED MUSCLE
It lies in the temporal fossa.
Origin :floor of temporal fossa
& temporal fascia.
Insertion :by a tendon into the
coronoid process of the
mandible.
N.supply : deep temporal
nerves from the ant.division of
mandibular N.
Action : anterior fibers ---
elevate the mandible.
posterior fibers--- retract the
mandible.
11. MASSETER MUSCLE
AKA CHEWER
Origin : lower border &
inner surface of zygomatic arch.
Insertion : lateral (outer)
surface of ramus of the
mandible.
N.supply : masseteric N.
from anterior division of
mandibular N.
Action : raises the mandible.
12. LATERAL PTERYGOID
Origin :
UPPER HEAD---- from the
infratemporal surface of the greater wing
of sphenoid.
LOWER HEAD---- from the lateral
surface of lateral pterygoid plate.
Insertion :neck of mandible (pterygoid
fovea) & articular disc of T.M.J.
N.supply :anterior division.of
mandibular N.
Action:
1-Pulls the neck of mandible
forward with the articular disc to depress
mandible during opening of mouth.
2-Acting with
medial pterygoid of the same side during
movement of chewing. 3-
Acting with medial pterygoid to protrude
13. MEDIAL
PTERYGOID
Origin :
Superficial head----- from
the tuberosity of the maxilla.
Deep head----- from the medial
surface of the lateral pterygoid
plate.
Insertion: angle of mandible
(medial surface).
N.supply : main trunk of
mandibular N.
Action :
1-elevates the mandible.
2-Acting with lateral
pterygoid during movement of
14.
15. MOVEMENTS
Depression of mandibule by
lat.pterygoid, helped by digastric,
geniohyoid & mylohyoid muscles.
Elevation by temporalis, masseter,
and medial pterygoid.
Protrusion by lateral + medial
pterygoids of both sides.
Retraction by post.fibers of
temporalis .
Lateral chewing movement by
lat.& med. Pterygoids of both sides
acting alternately.
16.
17. WHAT IS TEMPOROMANDIBULAR
JOINT ??
The Temporomandibular joint or TMJ is a
complex, multiaxial, synovial, bicondylar
and ginglimodiarthroidial type of joint. It
is highly specialized unique joint and has
got many distinctive characteristics.
20. TEMPROMANDIBULAR JOINT
(TMJ)
Articlation : between the
articular tubercle & mandibular
fossa of temporal bone, and the
head of mandible (condyloid
process).
Type :condyloid synovial
joint.
Capsule :it surrounds the
joint.
Synovial membrane--- lines
the capsule in upper & lower
cavities.
21. LIGAMENTS OF TEMPEROMANDIBULAR
JOINT
Lateral temporomandibular
ligament : lies on the lateral side of
joint ,between the tubercle and lateral
surface of the neck of mandible.
Sphenomandibular ligament :
lies on the medial side of the joint ,it
connects the spine of sphenoid to the
lingula of mandibular foramen.
Stylomandibular ligament behind
& medial .to the joint.It is a band of
thickened deep cervical fascia,
from apex of styloid process to angle
of mandibule.
22. INTRACAPSULAR ARTICULAR
DISC
It is a plate of fibro-cartilage, it
divides the joint into upper & lower
cavities.
It is attached in front to the
tendon of lat. pterygoid , and by
fibrous bands to head of mandible.
Its upper surface is concavo-
convex to fit the articular tubercle
& mandibular fossa , while
its lower surface is
concave to fit the head of mandible.
23. NERVE SUPPLY
• auriculotemporal & masseteric branches of
MANDIBULAR NERVE
VASCULARISATION
Arterial Supply:
Branches of External Carotid Artery
1.Superficial temporal artery
2.Deep auricular artery
3.Anterior tympanic artery
4.Ascending pharyngeal artery
5.Maxillary artery
Venous Supply:
1.Venous plexus
2.MaxillarY vein
3.Transverse facial vein
4.Supericial temporal vein
NOTE : The blood supply of TMJ is only superficial i.e there is no
blood supply in the capsule. It takes its nourishment from Synovial
fluid.
24. CLINICAL SIGNIFICANCE OF THE
TMJ
• The great strength of the Lat.TM ligament prevents head of mandible from
passing backward to cause fracture of the tympanic plate in case of
severe blow on the chin.
• The articular disc may be partially detached causing noisy & audible
click, during movements of the joint.
26. DISORDERS DUE TO EXTRINSIC FACTORS
Masticatory muscle disorders:
a. Protective muscles splinting
b. Masticatory muscle spasm( MPD syndrome)
c. Masticatory muscle inflammation (myositis)
Problems that result from extrinsic trauma:
a. Traumatic arthiritis
b. Fracture
c. Internal disc derangement
d. Myositis, myospasm
e. Tendonitis
f. Contracture of elevator muscle
27. DISORDERS DUE TO INTRINSIC
FACTORS
1. Trauma
a. Dislocation, subluxation
b. Heamarthrosis
c. Intracapsular and extracapsular fracture
2. Internal disc displacememt
a. Anterior disc displacemet with reduction
b. Anterior disc displacement without reduction
3. Arthiritis
a. Osteoarthiritis
b. Rheumatoid arthiritis
c. Juvenile rheumatoid arthiritis
d. Infection arthiritis
4. Developmental defects
a. Condylar agenesis or aplasia
b. Bifid condyle
c. Condylar hyperplasia
5. Ankylosis
6. Neoplasms
28. DISLOCATION OF THE TMJ
• Sometimes occurs when the mandible is
depressed.
• In case of minor blow on chin or sudden
contraction of lateral pterygoids as in
yawning, leads to pull the head of
mandible & articular disc forward
beyond the summit of tubercle.
• Reduction of disloction : by pressing the
thumbs downward on the lower molar
teeth and pushing the jaw backward.
29. Imaging Features
Anterior disc displacement: posterior band of the
disc located anterior to the superior portion of
the condyle at closed mouth on oblique sagittal
images
Disc may have normal (biconcave) or deformed
morphology
In opened mouth position disc may be in a
normal position (“with reduction”) or continue to
be displaced (“without reduction”)
Internal Derangements
35. Osteoarthritis
Definition
Non-inflammatory focal degenerative disorder of
synovial joints, primarily affecting articular
cartilage and sub-condylar bone; initiated by
deterioration of articular soft-tissue cover and
exposure of bone.
Clinical Features
Crepitation sounds from joint(s)
Restricted or normal mouth opening capacity
Pain or no pain from joint areas and/or of
mastication muscles
Occasionally, joints may show inflammatory signs
Women more frequent than men
37. Rheumatoid arthritis. A MRI shows completely destroyed disc, replaced
by fibrous or vascular pannus and cortical punched-out erosion (arrow)
with sclerosis in condyle.
44. BENIGN TUMORS
Synovial Chondromatosis
• Benign tumor characterized by cartilaginous metaplasia of
synovial membrane, usually in knee, producing small
nodules of cartilage, which essentially separate from
membrane to become loose bodies that may ossify.