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DHBS 301 > TMJ > Flashcards

TMJ Flashcards

(50 cards)

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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

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A

Branches of the superficial temporal and maxillary

22
Q

Translation of the TMJ must occur in order for..

Study These Flashcards
A

The jaw to open widely

23
Q

Masseter origin

Study These Flashcards
A

Zygomatic arch

24
Q

Masseter insertion

Study These Flashcards
A

Lateral surface of the ramus and angle

25
Masseter innervation
Masseteric nerve of CN V3
26
Masseter action
- Elevate mandible - Protrusion - Retrusion
27
What part of the master assists in protrusion?
Superior head
28
What part of the master assists in retrusiuon?
Deep head
29
Temporalis origin
- Temporal lines - Temporal fossa
30
Temporalis insertion
- Coronoid process - Ramus
31
Temporalis innervation
Anterior and posterior deep temporal, CN V3
32
Temporalis action
- Elevate mandible - Retrude mandible
33
Lateral pterygoid muscle origin, superior head
- Infratemporal surface of greater sphenoid wing - Infratemporal ridge
34
Lateral pterygoid muscle origin, inferior head
Lateral surface of lateral pterygoid plate of sphenoid
35
Lateral pterygoid muscle insertion
- Pterygoid fovea on neck of mandible - Articular disc
36
Lateral pterygoid muscle innervation
Lateral pterygoid nerve, CN V3
37
Lateral pterygoid muscle action
- Depression of mandible - Protrusion of mandible
38
Medial pterygoid muscle, superficial head origin
Maxillary tuberosity
39
Medial pterygoid muscle, deep head origin
Medial surface of lateral pterygoid plate of sphenoid
40
Medial pterygoid muscle insertion
Medial aspect of ramus and angle of mandible
41
Medial pterygoid muscle innervation
Medial pterygoid nerve of CN V3
42
Medial pterygoid muscle action
- Elevate mandible - Protrudes mandible
43
What muscles elevate the mandible?
- Temporalis - Masseter - Medial pterygoid
44
What muscles retrude the mandible?
- Temporalis - Masseter
45
What muscles protrudes the mandible
- Lateral pterygoid muscle - Masseter - Medial pterygoid, superficial head
46
What muscle depresses the mandible?
Lateral pterygoid
47
Anterior dislocation of the TMJ
- Mandibular condyle is anterior of the articular eminence - Jaw is open
48
What is the most common type of TMJ dislocation?
Anterior dislocation
49
What is TMD?
Acute/chronic problems with the TMJ that can result in pain or dysfunction
50
Components of the TMJ
- Articular disc - Synovial membrane - Joint capsule - Ligaments

DHBS 301 (21 decks)

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