lec 15 T.M.J.Muscles-of-mustication.pptx

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.

A brief on the anatomy of the temporomandibular joint, the muscles of mastication and their clinical aspects.

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.

The temporomandibular joint (TMJ) connects the mandible to the skull and regulates movement of the mandible, which is important for chewing and speaking. It is a synovial joint with both gliding and hinge-like movements. The TMJ consists of the mandibular condyle, glenoid fossa, articular eminence, articular disc, synovial membrane, and surrounding ligaments. It allows the mandible to open and close via hinge movement of the condyle and sliding of the articular disc. The synovial membrane lubricates the joint and nourishes the articulating bones. Various muscles like the masseter and lateral pterygoid are

The document summarizes the anatomy of the temporomandibular joint (TMJ) in 3 sentences: The TMJ is a synovial joint between the mandible and temporal bone that allows complex jaw movements. It contains articular discs that glide over the mandibular condyles and fossa and are surrounded by a joint capsule. The TMJ has multiple ligaments and is innervated by branches of the trigeminal nerve while its blood supply comes from branches of the external carotid artery.

This document provides an overview of the anatomy and biomechanics of the temporomandibular joint (TMJ). It describes the TMJ as a compound synovial joint that connects the lower jaw to the skull. The TMJ allows for complex movements through its articular disc and surrounding ligaments. The document outlines the embryonic development of the TMJ and provides detailed descriptions of the anatomical structures that make up the joint, including the articular surfaces, disc, ligaments, innervation, and vascularization. It explains the biomechanical functions of these structures during jaw movements like opening, closing, and rotating.

1.TEMPORAL AND INFRATEMPORAL FOSSA 2.MUSCLE OF MASTICATION (ORIGIN,INSERTION,NERVE SUPPLY,FUNCTION) 3.TEMPOROMANDIBULAR JOINT (ANATOMY,SUPPY,SIGNIFICANCE ,DISORDERS,INVESTIGATIONS)

The temporomandibular joint (TMJ) connects the jaw bone to the skull. It is a complex synovial joint that allows for movement of the mandible during chewing and talking. The TMJ has both bony and soft tissue components including the condyle, glenoid fossa, articular disc, joint capsule, ligaments and muscles. The TMJ develops late in utero and has a complex anatomy that facilitates its range of motion. Disorders can affect the TMJ resulting in problems like pain, limited movement or locking of the jaw.

The muscles of mastication include the masseter, temporalis, medial pterygoid, and lateral pterygoid muscles. These primary muscles elevate, protrude, retract, and move the mandible laterally during chewing. The masseter muscle originates on the zygomatic arch and inserts on the mandible ramus. The temporalis muscle originates broadly on the temporal fossa and inserts into the coronoid process and mandible. The medial and lateral pterygoid muscles both originate on pterygoid processes and insert on the mandible ramus and condyle, respectively. Secondary muscles like the digastric and mylohyoid also assist in mastication by depressing