Podcast
Questions and Answers
Where is the ascending limb attached to?
Where is the ascending limb attached to?
- Posterior surface of head
- Anterior margin of the squamous tympanic fissure (correct)
- Neck of condyle
- Capsule
What is the attachment site of the descending limb?
What is the attachment site of the descending limb?
- Anterior margin of the squamous tympanic fissure
- Behind the disc
- Capsule
- Posterior surface of head and neck of condyle (correct)
Where does the disc divide?
Where does the disc divide?
- Behind the ascending limb
- At the squamous tympanic fissure
- Behind the disc (correct)
- Behind the descending limb
What is the attachment site of the disc?
What is the attachment site of the disc?
How does the disc divide?
How does the disc divide?
Which part of the disc has some fibers of lateral pterygoid muscle attached to it?
Which part of the disc has some fibers of lateral pterygoid muscle attached to it?
What is characteristic of the looser posterior part of the disc covering?
What is characteristic of the looser posterior part of the disc covering?
Where is the synovial membrane absent?
Where is the synovial membrane absent?
What is the characteristic of the dense weight-bearing region of the disc?
What is the characteristic of the dense weight-bearing region of the disc?
What can be found in the articular areas of condyle, glenoid fossa, and articular eminence?
What can be found in the articular areas of condyle, glenoid fossa, and articular eminence?
Where do the branches converge?
Where do the branches converge?
What type of blood vessels pass into the posterior part of the articular disc?
What type of blood vessels pass into the posterior part of the articular disc?
What is the function of the articular disc?
What is the function of the articular disc?
Where do the small arteries, arterioles, and capillaries pass into?
Where do the small arteries, arterioles, and capillaries pass into?
What is the purpose of the capsule of the joint?
What is the purpose of the capsule of the joint?
What type of cells do fibroblasts develop into with advancing age?
What type of cells do fibroblasts develop into with advancing age?
What is the result of fibroblasts developing into chondroid cells?
What is the result of fibroblasts developing into chondroid cells?
What is found in old age?
What is found in old age?
What is the sequence of cell development from fibroblasts?
What is the sequence of cell development from fibroblasts?
What is the final stage of cell development from fibroblasts?
What is the final stage of cell development from fibroblasts?
What is the purpose of the ligaments in the temporomandibular joint?
What is the purpose of the ligaments in the temporomandibular joint?
What is prevented by the ligaments in the temporomandibular joint?
What is prevented by the ligaments in the temporomandibular joint?
What happens if the ligaments in the temporomandibular joint fail?
What happens if the ligaments in the temporomandibular joint fail?
Which of the following is a function of the ligaments in the temporomandibular joint?
Which of the following is a function of the ligaments in the temporomandibular joint?
What is the result of the ligaments limiting the range of movement of condyle?
What is the result of the ligaments limiting the range of movement of condyle?
Flashcards are hidden until you start studying
Study Notes
Temporomandibular Joint (TMJ) Structure
- Small arteries, arterioles, and capillaries pass through the posterior part of the articular disc.
Articular Disc Attachments
- The disc divides into ascending and descending limbs behind.
- The ascending limb is attached to the anterior margin of the squamous tympanic fissure.
- The descending limb is attached to the posterior surface of the head and neck of the condyle.
- Some fibers of the lateral pterygoid muscle attach to the anterior border of the disc.
Disc Covering
- The looser posterior part of the disc is vascularized and covered by a vascular synovial membrane.
- The synovial membrane is absent in:
- Articular areas of the condyle, glenoid fossa, and articular eminence
- Dense, weight-bearing regions of the disc (central and anterior parts)
Age-Related Changes
- With age, fibroblasts develop into chondroid cells, which later differentiate into true chondrocytes.
- Small islands of hyaline cartilage may be found in old age.
Ligament Function
- The ligaments limit the range of movement of the condyle, preventing it from:
- Coming into contact with the tympanic plate behind
- Passing beyond the articular eminence in front
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
