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Neuroendocrine Exam 1 > 16. Infratemporal Fossa and Temporomandibular Joint (Wright) > Flashcards

16. Infratemporal Fossa and Temporomandibular Joint (Wright) Flashcards

1
Q

Nerve to the mylohyoid arises off of what other nerve?

A

Inferior alveolar N.

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2
Q

What muscles are responsible for depression of the jaw?

A

Suprahyoid muscles.

Infrahyoid muscles.

Lateral Pterygoid.

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3
Q

The “tensor” muscles of the face are innervated by which cranial nerve?

A

Trigeminal N.

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4
Q

What is the specific funciton of the stylomandibular and sphenomandibular Ls.?

A

The stylomandibular L. and the sphenomandibular L. specifically halt anterior dislocation of the mandible.

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5
Q

Identify the corresponding structures.

A
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6
Q

What muscles are responsible for the protraction of the jaw?

A

Masseter.

Lateral pterygoid.

Medial pterygoid.

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7
Q

What do the cell bodies of the otic ganglion ultimately serve?

A

The parotid gland.

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8
Q

What are the muscles of mastication?

A

Temporalis M..

Masseter M..

Lateral and Medial Pterygoid Ms.

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9
Q

What pulls the articular disc of the TMJ forward during wide jaw opening?

A

Superior head of the lateral pterygoid M.

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10
Q

What is the function of the buccal N. from the mandibular branch of the trigeminal?

What is the funciton of the buccal branch of the facial nerve?

A

Buccal nerve from V3 provides sensation to the interior cheek and part of the gums.

The buccal branch of the facial nerve provides motor innervation to the buccinator muscle.

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11
Q

What four ligaments hold the TMJ together?

A

Joint capsule

Sylomandibular L.

Sphenomandibular L.

Lateral temporomandibular L.

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12
Q

Where is the injection site for the anterior superior alveolar nerve?

A

Just at the exit of the infraorbital foramen. The infraorbital nerve must be blocked.

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13
Q

Where does the branchiomotor portion of the facial nerve exit the skull?

A

Through the stylomastoid foramen.

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14
Q

A fracture of the ramus of the mandible can damabe what structures?

A

Inferior alveolar artery and nerve.

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15
Q

What muscles are responsible for “retrusion” of the mandible?

A

Masseter M.

Temporalis M.

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16
Q

What foramen does the inferior alveolar N. enter?

A

The mandibular foramen.

17
Q

What muscles are innervated by V3?

A

Muscles of mastication.

Mylohyoid M. and anterior belly of the digastric M.. (Nerve to mylohyoid.)

Tensor veli palatini M.

Tensor tympani M.

18
Q

Nerve to the tensor tympani comes out of what structure?

A

The otic ganglion

19
Q

What muscles are responsible for lateral movements of the jaw?

A

Lateral pterygoid M.

Temporalis M.

Masseter M.

20
Q

What are the contents of the infratemporal fossa?

A
  • inferior part of temporalis M.
  • lateral and medial Pterygoid M.
  • Maxilalry A.
  • Pterygoid venous plexus
  • INferior alveolar n (v3)
  • lingual n (v3)
  • Buccal n. (v3)
  • Chorda Tympani (CN7)
  • otic ganglion and glossopharyngeal n.
21
Q

What are the boundaries of the infratemporal fossa?

A
22
Q

What kind of fibers are carried in the lingual nerve?

A

Sensory nerve fibers. (Not taste, which is carried by the chorda tympani, which runs with the lingual nerve, but is not IN the lingual nerve.)

23
Q

What muscles are responsible for elevation of the jaw?

A

Temporalis M.

Masseter M.

Medial pterygoid M.

24
Q

What nerves supply the TMJ?

A

Auriculotemporal (posterior branch).

Masseteric N.

25
Q

Where can we find the otic ganglion?

A

Posterior and inferior to V3 as it exits the foramen ovale.

26
Q

Fracture high on the neck of the mandible can interfere with what structures?

A

Branches of the maxillary A. - such as deep auricular and anterior tympanic.

27
Q

What are the accessory muscles of mastication?

What are they innervated by?

A

Buccinator M. and Orbicularis Oris M.

Facial Nerve (as muscles of facial expression).

28
Q

Where are the injection sites for the posterior and middle superior alveolar nerve blocks?

A

By the molars for posterior, and by the premolars for middle.

29
Q

Where is the injection site for the inferior posterior alveolar nerve?

A

Just inferior and lateral to the pterygomandibular raphe.

(The pterygomandibular raphe is the junction of the buccinator and the superior pharyngeal constrictor Ms.)

30
Q

Important Foramen in the Temporal Fossa and Why?

A

Foramen Ovale

V3 passes through it

31
Q

Fractures of the Mandible and related pathology

A

Fracture through neck of mandible-likely injure V3 or otic ganglion

Fracture of Ramus-injure inferior alveolar neurovasculature

Fracture of Corpus-Injure inferior alveolar n.

32
Q

Massester M. Action and Innervation

A

elevates mandible

helps with protract/retract/side-side motions

Masseteric N. (V3)

33
Q

Temporalis M. Action and Innervation

A

Elevate Mandible

helps with retraction and lateral movement

Deep Temporal N. (V3)

34
Q

Lateral and Medial Pterygoid M. Action and Innervation

A

Lateral: Protrudes, opens, ipsilateral side to side/grinding

LAteral Pterygoid N. (V3)

Medial: Elevate, ipsilateral side-side movement

Medial Pterygoid N. (V3)

35
Q

What muscles open the mandible by elevating hyoid?

A

Digastric (ant-nerve to mylohyoid, CN V, post. CN VII)

Geniohyoid (Ant. Ramus C1)

Mylohyoid (Mylohyoid N, V3)

Stylohyoid (CN VII)

these elevate/draw forward the hyoid bone

36
Q

What opens the mandible by fixing/drawing down the hyoid?

A

Sternohyoid (ansa cervicalis)

Sternothyroid (ansa cervicalis)

Thyrohyoid (Ant. ramus C1 & 4)

Omohyoid (Ansa cervicalis)

Depress/fix hyoid and larynx during swallowing

37
Q

These ligaments limit inferior excursion at the TMJ

A

sphenomandibular L.

Stylomandibular L.

38
Q

Superior head of the lateral pterygoid attaches to what unique feature of the TMJ

A

articular disc and helps move the disc when opening the jaw

39
Q

What is the function of the posterior and anterior bands of the articular disc?

A

helps keep the articular disc in place

Note that the TMJ essentially anterior dislocates every time the jaw is open to an angle greater than 15’

Neuroendocrine Exam 1 (22 decks)

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