Temporomandibular Joint Flashcards Preview

Spinal Anatomy I - Exam 3 > Temporomandibular Joint > Flashcards

Flashcards in Temporomandibular Joint Deck (15):
1

What are the joint classifications of the temporomandibular joint?

- complex joint
- synovial (diarthrosis) condylar
- synovial (diarthrosis) bicondylar
- synovial (diarthrosis) arthrodia
- synovial (diarthrosis) ginglymus

2

What are the articular surfaces of the temporomandibular joint?

- condylar surface of the mandible
- glenoid/mandibular fossa of the temporal bone
- an articular disc

3

What are the extracapsular ligaments of the temporomandibular joint?

- temporomandibular/lateral lig.
- stylomandibular lig.
- sphenomandibular lig.

4

What are the attachment sites of the temporomandibular/lateral lig.?

zygomatic process and articular tubercle of the temporal bone to neck of the mandible

5

What does the temporomandibular/lateral lig. represent?

a thickening of the fibrous capsule of the temporomandibular joint

6

What are the attachment sites of the stylomandibular/lateral lig.?

styloid process of the temporal bone to the angle of the mandible

7

What does the stylomandibular lig. represent?

a thickening of the deep cervical fascia

8

What are the attachment sites of the sphenomandibular/lateral lig.?

the spine of the sphenoid bone to the lingula of the mandible

9

What does the sphenomandibular lig. represent?

a remnant of Meckel's cartilage of the first branchial arch

10

What muscles are vital to movement of the temporomandibular joint?

- lateral pterygoid
- medial pterygoid
- masseter
- temporalis

11

What muscles act to depress the mandible or open the mouth?

- lateral pterygoid
- suprahyoid
- infrahyoid

12

What muscles act to elevate the mandible or close the mouth?

- temporalis
- masseter
- medial pterygoid

13

What muscles act to protract the mandible or protrude the chin?

- masseter
- medial pterygoid
- lateral pterygoid

14

What muscle acts to retract the mandible or pull the chin back?

temporalis

15

What muscles act during the action of grinding on the temporomandibular joint?

- ipsilateral temporalis
- contralateral medial pterygoid
- contralateral lateral pterygoid
- both masseters

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