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NeuroEndo Test 1 > Infratemporal Fossa and Temperomandibular Joint > Flashcards

Infratemporal Fossa and Temperomandibular Joint Flashcards

1
Q

Where are the temporal fossa and infra temporal fossa located?

A

Space superior to the zygomatic arch

Space inferior to zygomatic arch

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2
Q

What is the lateral boundary of the infratemporal fossa?

A

ramus of mandible

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3
Q

What is the anterior boundary of the infratemporal fossa?

A

Maxilla

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4
Q

What is the medial boundary of the infratemporal fossa?

A

Lateral pterygoid plate

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5
Q

What is the roof of the infratemporal fossa?

A

Greater wing of the sphenoid

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6
Q

What is the posterior boundary of the infratemporal fossa?

A

Tympanic plate and mastoid

Styloid processes

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7
Q

What is the inferior boundary of the infratemporal fossa?

A

Angle fo the mandible

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8
Q

What muscles are found in the infratemporal fossa?

A

Inferior portion of the temporalis

Lateral and medial pterygoid muscles

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9
Q

What arteries are found in the infratemporal fossa?

A

Maxillary a.

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10
Q

What veins are found in the infratemporal fossa?

A

Pterygoid venous plexus

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11
Q

What nervous structures are found in the infratemporal fossa?

A 
Inferior alveolar n. (V3)
Lingual n. (V3)
Buccal n. (V3)
Chorda tympani (CN VII)
Otic ganglion= how glossopharyngeal nerve serves parotid aka what covers the area
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12
Q

What are the branches of the mandibular (external) part of the maxillary a.?

A 
Deep auricular a. 
Anterior tympanic a.
Inferior aveolar a. --> mylohoid a. and mental a.
Middle meningeal a.
Accessory meningeal a.
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13
Q

What does the deep auricular a. supply?

A

external acoustic meatus
external tympanic membrane
TMJ

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14
Q

What does the anterior tympanic a. supply?

A

Internal TM

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15
Q

What does the inferior alveolar a. supply? How does it branch

A

Enters mandibular foramen and supples mandible, mandibular teeth, chin, and mylohyoid m.

Gives off mylohoid a. right before lingual foramen and goes through mental foramen to become mental a.

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16
Q

What does the middle meningeal a. supply?

A

Enters cranium via foramen spinosum and supplies dura mater of the lateral wall, trigeminal ganglion
facial nerve and geniculate ganglion
tympanic cavity
tensor tympani m.

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17
Q

What does the accessory meningeal a. supply?

A

Enters cranium via foramen ovale and supplies extracranial muscles of infratemporal fossa
Otic ganglion
Sphenoid Bone

18
Q

What are the branches of the pterygoid part of the maxillary a.?

A

Deep temporal a.
Pterygoid branches
Massteric a.
Buccal a.

19
Q

What does the deep temporal a. supply?

A

Temporalis m.

20
Q

What does the pterygoid branches supply?

A

Pterygoid muscles

21
Q

What does the massteric a. supply?

A

TMJ

Masseter M.

22
Q

What does the buccal a. supply?

A

Buccal fat pad
Buccinator
Buccal Oral Mucosa

23
Q

What are the 4 paired muscles of mastication? What other muscles aid in chewing?

A

Temporalis
Masseter
Lateral and Medial pterygoid

Buccinator: keeps food on molars so doesn’t drop to cheek/lower jaw
Obicularis oris: keeps food in mouth

24
Q

What is the origin, insertion, innervation, and action of the masseter m.?

A

Zygomatic arch
angle and ramus of the mandible
Massteric n. (of CN V3)
Elevate mandible, protract, retract, side-to side rotation

25
Q

What is the origin, insertion, innervation, and action of the temporalis m.?

A

Temporal fossa/fascia
Coronoid process of mandible
Deep temporal n. (CN V3)

Vertical: Elevate
Horizontal: Retract
Unilateral: lateral movement aka chewing

26
Q

What is the origin, insertion, innervation, and action of the lateral pterygoid?

A

Greater wing of sphenoid and lateral pterygoid plate
Mandible and TMJ
Lateral pterygoid n. (CN V3)
Bilateral: protrudes
Unilateral: side to side with ipsilateral medial pterygoid

27
Q

What is the origin, insertion, innervation, and action of the medial pterygoid?

A

Maxilla, palatine bone, and medial pterygoid plate and fossa
Pterygoid rugosity of the mandibular angle
medial pterygoid n. (CN V3)
Bilateral: elevate
Unilateral: side to side with ipsilateral lateral

28
Q

What muscles elevate the mandible?

A

Temporalis
Masseter
Medial Pterygoids

29
Q

What muscles depress the mandible?

A

lateral pterygoids
suprahyoid
infrahyoid

30
Q

What muscles protrude the mandible?

A

Lateral and medial pterygoids

masseter

31
Q

What muscles retrude the mandible?

A

temporalis

masseter

32
Q

What muscles laterally move the mandible?

A

ipsilateral temporalis and masseter

contralateral pterygoids

33
Q

What ligaments make up the TMJ? What are their jobs?

A

Sphenomandibular ligament
Stylomandibular ligament

Halt anterior dislocation of jaw= head of mandible pulled away from temporal bone
Limit inferior excursion

34
Q

What is the role of the posterior and anterior bands of the anterior disc? What muscle attaches here?

A

Helps as head slides forward so when you gape you mouth more the disc stay in place

superior head of lateral pterygoid m.

35
Q

What innervate the TMJ?

A

Auriculoptemporal n.
Posterior deep temporal n.
Masseteric n.

** Hilton’s law both masseter and temporalis cross joint so their nerves innervate **

36
Q

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

What is the function 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.

37
Q

What foramen does the inferior alveolar N. enter?

A

mandibular foramen

38
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.

39
Q

Nerve to the tensor tympani comes out of what structure?

A

Otic ganglion

40
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.)

41
Q

Where can we find the otic ganglion?

A

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

NeuroEndo Test 1 (14 decks)

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