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DHBS 301 > TMJ > Flashcards

TMJ Flashcards

1
Q

What type of joint is the TMJ?

A

Modified hinge-type synovial joint

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2
Q

What are the articulations of the TMJ?

A
  • Head of mandible
  • Mandibular fossa of temporal bone
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3
Q

What attaches to the lingula?

A

Spehnomandibular ligament

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4
Q

What attaches to the coronoid process?

A

Temporalis

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5
Q

What attaches to the pterygoid fovea?

A

Lateral pterygoid muslce

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6
Q

What attaches to the ramus of the mandible?

A
  • Masseter
  • Medial pterygoid muscle
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7
Q

What attaches to the angle of the mandible?

A
  • Stylomandibular ligament
  • Masseter
  • Medial pterygoid muscle
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8
Q

Post-glenoid tubercle function

A

Prevent posterior dislocation of the TMJ

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9
Q

What attaches to the styloid process?

A

Stylomandibular ligament

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10
Q

What attaches to the spine of the sphenoid?

A

Sphenomandibular ligament

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11
Q

Two articulation of the temporal bone?

A
  • Mandibular fossa
  • Articular eminence
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12
Q

Tempromandibular ligament function

A

Prevent posterior dislocation of TMJ

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13
Q

What stabilizes the TMJ?

A

Fibrous joint capsule

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14
Q

The articular disks separates…

A

The TMJ into two synovial compartments

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15
Q

Hinge/rotational movements of TMJ

A

Inferior synovial cavity

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16
Q

Gliding/translational actions of TMJ

A

Superior synovial compartment

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17
Q

Is the retrodiscal tissue vascularized?

A

Yes, heavily vascularized

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18
Q

Is the central portion of the articular disc vascularized?

A

No

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19
Q

Does the central portion of the articular disc have sensory innervation?

A

No

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20
Q

Sensory innervation of the TMJ

A

Branches of the auriculotemporal nerve

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21
Q

Arterial supply to the TMJ

A

Branches of the superficial temporal and maxillary

22
Q

Translation of the TMJ must occur in order for..

A

The jaw to open widely

23
Q

Masseter origin

A

Zygomatic arch

24
Q

Masseter insertion

A

Lateral surface of the ramus and angle

25
Q

Masseter innervation

A

Masseteric nerve of CN V3

26
Q

Masseter action

A
  • Elevate mandible
  • Protrusion
  • Retrusion
27
Q

What part of the master assists in protrusion?

A

Superior head

28
Q

What part of the master assists in retrusiuon?

A

Deep head

29
Q

Temporalis origin

A
  • Temporal lines
  • Temporal fossa
30
Q

Temporalis insertion

A
  • Coronoid process
  • Ramus
31
Q

Temporalis innervation

A

Anterior and posterior deep temporal, CN V3

32
Q

Temporalis action

A
  • Elevate mandible
  • Retrude mandible
33
Q

Lateral pterygoid muscle origin, superior head

A
  • Infratemporal surface of greater sphenoid wing
  • Infratemporal ridge
34
Q

Lateral pterygoid muscle origin, inferior head

A

Lateral surface of lateral pterygoid plate of sphenoid

35
Q

Lateral pterygoid muscle insertion

A
  • Pterygoid fovea on neck of mandible
  • Articular disc
36
Q

Lateral pterygoid muscle innervation

A

Lateral pterygoid nerve, CN V3

37
Q

Lateral pterygoid muscle action

A
  • Depression of mandible
  • Protrusion of mandible
38
Q

Medial pterygoid muscle, superficial head origin

A

Maxillary tuberosity

39
Q

Medial pterygoid muscle, deep head origin

A

Medial surface of lateral pterygoid plate of sphenoid

40
Q

Medial pterygoid muscle insertion

A

Medial aspect of ramus and angle of mandible

41
Q

Medial pterygoid muscle innervation

A

Medial pterygoid nerve of CN V3

42
Q

Medial pterygoid muscle action

A
  • Elevate mandible
  • Protrudes mandible
43
Q

What muscles elevate the mandible?

A
  • Temporalis
  • Masseter
  • Medial pterygoid
44
Q

What muscles retrude the mandible?

A
  • Temporalis
  • Masseter
45
Q

What muscles protrudes the mandible

A
  • Lateral pterygoid muscle
  • Masseter
  • Medial pterygoid, superficial head
46
Q

What muscle depresses the mandible?

A

Lateral pterygoid

47
Q

Anterior dislocation of the TMJ

A
  • Mandibular condyle is anterior of the articular eminence
  • Jaw is open
48
Q

What is the most common type of TMJ dislocation?

A

Anterior dislocation

49
Q

What is TMD?

A

Acute/chronic problems with the TMJ that can result in pain or dysfunction

50
Q

Components of the TMJ

A
  • Articular disc
  • Synovial membrane
  • Joint capsule
  • Ligaments

DHBS 301 (21 decks)

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