Temporomandibular Joint Flashcards Preview

Spinal Anatomy I - Exam 3 > Temporomandibular Joint > Flashcards

Flashcards in Temporomandibular Joint Deck (15)
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1
Q

What are the joint classifications of the temporomandibular joint?

A
  • complex joint
  • synovial (diarthrosis) condylar
  • synovial (diarthrosis) bicondylar
  • synovial (diarthrosis) arthrodia
  • synovial (diarthrosis) ginglymus
2
Q

What are the articular surfaces of the temporomandibular joint?

A
  • condylar surface of the mandible
  • glenoid/mandibular fossa of the temporal bone
  • an articular disc
3
Q

What are the extracapsular ligaments of the temporomandibular joint?

A
  • temporomandibular/lateral lig.
  • stylomandibular lig.
  • sphenomandibular lig.
4
Q

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

A

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

5
Q

What does the temporomandibular/lateral lig. represent?

A

a thickening of the fibrous capsule of the temporomandibular joint

6
Q

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

A

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

7
Q

What does the stylomandibular lig. represent?

A

a thickening of the deep cervical fascia

8
Q

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

A

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

9
Q

What does the sphenomandibular lig. represent?

A

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

10
Q

What muscles are vital to movement of the temporomandibular joint?

A
  • lateral pterygoid
  • medial pterygoid
  • masseter
  • temporalis
11
Q

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

A
  • lateral pterygoid
  • suprahyoid
  • infrahyoid
12
Q

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

A
  • temporalis
  • masseter
  • medial pterygoid
13
Q

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

A
  • masseter
  • medial pterygoid
  • lateral pterygoid
14
Q

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

A

temporalis

15
Q

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

A
  • ipsilateral temporalis
  • contralateral medial pterygoid
  • contralateral lateral pterygoid
  • both masseters

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