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Neuro > Deep Face And Infratemporal Fossa > Flashcards

Deep Face And Infratemporal Fossa Flashcards

1
Q

What are the muscles of mastication?

Innverated by?

A

Masseter
Temporalis
lateral pterygoid
Medial pterygoid

V3

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2
Q

What is the O and I of the:

masseter M.?

A

O: zygomatic bone, zygomatic arch

I: mandibular angle and Ramus

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3
Q

What is the O and I of the:

Temporalis M.?

A

O: temporal fossa

I: coronoid process of the mandible

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4
Q

What is the O and I of the:

Lateral Pterygoid?

A

O: greater wing of sphenoid bone, lateral pterygoid plate

I: mandible and TMJ articular disc (!!)

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5
Q

What is the O and I of the:

Medial Pterygoid

A

O: maxillary tuberosity and palatine bone(Superifical head),
lateral pterygoid plate and pterygoid fossa (Deep head)

I: mandibular angle

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6
Q

What opens the mouth?

A

Lateral pterygoid m.

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7
Q

Action of the:

masseter m.?

A

Elevate mandible

Protract, retract, side to side motion of mandible

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8
Q

Action of the:

Temporalis M. ?

A

Elevate mandible
Retract mandible
Lateral movement of mandible

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9
Q

Action of the:

Lateral Pterygoid?

A

Bilaterally: protrudes mandible and opens mouth

Unilaterally: side to side movement (grinding - works with medial pterygoid too)

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10
Q

Actions of the:

medial pterygoid?

A

Bilaterally:

Elevates and protrudes mandible

Unilaterally:
Protrude mandible and side to side chewing (grinding)

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11
Q

What does the TMJ articulate with?

A

Mandibular fossa
Head of mandible
Articular tubercle (from Squamous part of temporal bone)

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12
Q

What type of joint is the TMJ?

A

Hinge and glide joint

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13
Q

What are the articular surfaces separated by?

What are the bones covered by?

A

Articular disc

Fibrocartilage

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14
Q

What attaches to the articular disc of the TMJ?

A

Lateral pterygoid m.

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15
Q

What are the 3 extracapsular Ls.?

Function of these?

A

Lateral L.
Sphenomandibular L.
Stylomandibular L.

Stabilize TMJ

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16
Q

Which ligament of the TMJ prevents posterior dislocation?

A

Lateral temporomandibular L.

+articular tubercle from squamous part of temporal bone

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17
Q

What supplies the TMJ?

What innervates the TMJ?

A

Branches of ECA;
Superficial temporal a.
Deep auricular a.

V3

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18
Q

What occurs during gape at the TMJ?

A

Teeth are in occlusion

Everything is shifted posteriorly

Disc more anterior

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19
Q

What happens within 15 degrees of gape?

What happens over 15 degrees of gape?

A

Within: hinging

Over: whole head drops out of fossa and slides anteriorly on articular fossa, dislocating anteriorly, protrusion assisted by pterygoid

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20
Q

What is lateral pterygoid dysfunction?

A

Articular disc will not slide properly and will click against articular tubercle

21
Q

What is a dislocation of the TMJ?

A

Results from blow to side of face, yawning, or taking a huge bite

Head of mandible slips out of mandibular fossa and is pulled anteriorly

Cannot close mouth

Facial and Auriculotemporal (V3) can be damaged

22
Q

What happens for a posterior dislocation of the TMJ?

A

Requires a large amount of force to displace postglenoid tubercle and strong lateral ligament

23
Q

What happens during arthritis of the TMJ?

A

Inflammation

Jaw pain, stiffness, joint grating

24
Q

How do you block inferior alveolar n.?

A

Enter thru gums b/w coronoid notch and pterygomandibular raphe

25
Q

What nerves could be injured during a dislocation of the TMJ?

A

Facial n.

Auriculotemporal n.

26
Q

What happens if you fracture the neck of the mandible?

A

Otic ganglion is gone

No parotid gland stimulation

27
Q

What happens if you fracture the ramus of the mandible?

A

No inferior alveolar n.

No mental n.

No sensation to chin

28
Q

What happens if you fracture the corpus of the mandible?

A

Inferior alveolar n. Gone

Mental n. Gone

29
Q

Where is the temporal fossa?

What muscle does it contain?

A

Space superior to zygomatic a.

Temporalis m. (Masseter over it).

30
Q

What is the infratemporal fossa?

A

Space found below zygomatic arch

31
Q

What are the boundaries of the infratemporal fossa?

A

Lateral: Ramus of mandible

Anterior: maxilla

Medial: Lateral pterygoid plate

Roof: greater wing of sphenoid

Posterior: tympanic plate, mastoid process, styloid process

Inferior: angle of mandible

32
Q

What are the contents of the infratemporal fossa?

A

Inferior portion of temporalis m.

Lateral pterygoid m.

Medial pterygoid m.

Maxillary a.

Pterygoid venous plexus

V3

Chorda tympani

Otic ganglion

33
Q

What a. Travels in the split of auriculotemporal n.?

A

Middle meningeal n.

34
Q

What innervates tensor veli palatini?

A

V3

35
Q

What innervates Levator Veli palatini?

A

CN 10

36
Q

What are the three parts of the maxillary a.?

A

Mandibular
Pterygoid
Pterygopalatine

37
Q

What are the As. Of the mandibular part of the maxillary A.?

A 
Deep auricular a. 
Anterior tympanic a. 
Middle meningeal a. 
Inferior alveolar a. 
Accessory meningeal a.
38
Q

What are the As. Of the pterygoid part of the maxillary A.?

A

Masseteric
Pterygoid
Deep temporal a.
Buccinator a.

39
Q

What are the As. Of the pterygopalatine part of the maxillary A.?

A

Sphenopalatine a. (Anastomoses with ethmoidal)

Descending palatine a. 
Infraorbital a. 
Posterior superior alveolar a. 
Middle superior alveolar a. 
Pharyngeal branches
Anterior superior alveolar a. 
A. Of the pterygoid canal
40
Q

What does the deep auricular a. Go thru?

What does it supply?

A

EAM

External tympanic membrane, TMJ

41
Q

What does the ANteiror tympanic a. Go thru?

A

Internal tympanic membrane

42
Q

What does the inferior alveolar a. Enter?
What does it supply?
What does it give off?

A

Mandible foramen

Supplies mandible, mandibular teeth, chin, mylohyoid m.

Mylohyoid a. And mental a.

43
Q

What does middle meningeal a. Enter cranium thru?

What does it supply?

A

Foramen spinosum

Supplies:
Dura mater of lateral wall
Trigeminal ganglion
Facial n. 
Geniculate ganglion
Tympanic cavity
Tensor tympani m.
44
Q

What does the accessory menigneal a. Enter cranium thru?

What does it supply?

A

Foramen ovale

Supplies:
Extracranial Ms. of infratemporal fossa
Otic ganglion
Sphenoid bone

45
Q

What does the deep temporal a. Supply?

A

Temporalis m.

46
Q

What do the pterygoid branches supply:

A

Pterygoid ms.

47
Q

What do the masseteric a. Supply?

A

TMJ

Masseter m.

48
Q

What does the buccal a. Supply?

What does it run with?

A

Buccal fat pad, buccinator, buccal oral mucosa

Buccal n. (V3)

Neuro (18 decks)

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