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NYCC Gross Anatomy 3 > Infratemporal Fossa > Flashcards

Infratemporal Fossa Flashcards

1
Q

parotid plexus nerves are branches of which cranial nerve?

A

VII

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2
Q

where does CN VII exit the skull?

A

stylomastoid foramen

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3
Q

what are the names of the 5 branches of the parotid plexus?

A

Temporal
Zygomatic
Buccal
Marginal Mandibular
Cervical

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4
Q

what is the function of the nerves of the parotid plexus?

A

motor to muscles of facial expression

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5
Q

what are the boundaries of the temporal fossa?

A
  • post/sup: temporal lines
  • ant: frontal & zygomatic bones
  • lat: zygomatic arch
  • inf: infratemporal crest
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6
Q

what is the lateral boundary of the infratemporal region?

A

ramus of mandible

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7
Q

what is the medial boundary of the infratemporal region?

A

lateral pterygoid plate

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8
Q

what is the anterior boundary of the infratemporal region?

A

posterior aspect of maxilla

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9
Q

what is the posterior boundary of the infratemporal region?

A

tympanic portion, mastoid process, styloid process

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10
Q

what is the superior boundary of the infratemporal region?

A

inferior surface of greater wing of sphenoid

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11
Q

what is the inferior boundary of the infratemporal region?

A

medial pterygoid attachment near mandibular angle

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12
Q

name the contents of the infratemporal fossa

A
  • inferior temporalis m
  • lateral & medial pterygoid mm
  • pterygoid venous plexus
  • maxillary a & branches
  • Mandibular V3 nn
  • chorda tympani
  • otic ganglion
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13
Q

what joint is part of the infratemporal fossa?

A

temporomandibular joint

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14
Q

name the 4 mandibular (V3) nerves

A

auriculotemporal
inferior alveolar
lingual
buccal

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15
Q

name the primary muscles of mastication

A
  • temporalis
  • masseter
  • lateral pterygoid
  • medial pterygoid
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16
Q

attachments of temporalis

A
  • superior temporal line
  • coronoid process of mandible
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17
Q

what nerve innervates temporalis?

A

CN V3 (deep temporal n)

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18
Q

actions of temporalis

A
  • elevate mandible (close jaw)
  • retrude chin
  • lateral movements
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19
Q

attachments of masseter

A
  • zygomatic bone/arch
  • angle & ramus of mandible
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20
Q

what nerve innervates masseter?

A

CN V3 (n to masseter)

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21
Q

actions of masseter

A
  • elevate mandible (close jaw)
  • protrude chin
  • retrude chin
  • lateral movements
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22
Q

attachments of lateral pterygoid

A

O: infratemporal surface & greater wing of sphenoid; lat. surface of lat. pterygoid plate
I: TMJ capsule & disc, condyle of mandible

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23
Q

innervation of lateral pterygoid

A

CN V3 (lateral pterygoid n)

24
Q

actions of lateral pterygoid

A
  • BL: protract mandible, depress chin
  • unilat: swing jaw to contra side
  • larger lateral chewing movements
25
Q

attachments of medial pterygoid

A

O: med. surface of lat. pterygoid plate & pyramidal process of palatine bone & tuberosity of maxilla

I: medial surface of mandible inf to mandibular foramen

26
Q

innervation of medial pterygoid

A

CN V3 (medial pterygoid n)

27
Q

actions of medial pterygoid

A
  • with masseter, elevates mandible
  • protrusion
  • smaller grinding movements
28
Q

what is the only muscle that depresses the chin (opens jaw)?

A

lateral pterygoid

29
Q

what 3 muscle groups are accessory muscles of mastication?

A

suprahyoid
infrahyoid
mm of facial expression

30
Q

action of infrahyoid muscles during mastication

A

fix or depress hyoid bone

31
Q

name the components of the temporomandibular joint

A
  • mandibular fossa of temporal bone
  • head (condylar process) of mandible
  • articular disc
  • stylomandibular lig
  • sphenomandibular lig
32
Q

what muscle attaches to the articular disc of the TMJ?

A

lateral pterygoid

33
Q

the pterygoid venous plexus is between what 2 muscles?

A

temporalis
lateral pterygoid

34
Q

the pterygoid venous plexus anastomoses with…

A
  • facial v -> cavernous sinus
  • maxillary v
35
Q

facial vein drains into what vessel?

A

common facial v (into internal jugular v)

36
Q

maxillary artery is a terminal branch of ____

A

external carotid a

37
Q

name the 3 parts of the maxillary artery

A
  1. mandibular
  2. pterygoid
  3. pterygo-palatine
38
Q

describe the location of the mandibular part of the maxillary artery

A

horizontal along lower border of lateral pterygoid & deep (medial) to condylar process of mandible

39
Q

name the branches of the mandibular part of the maxillary artery

A
  1. deep auricular a
  2. anterior tympanic a
  3. middle meningeal a
  4. inferior alveolar a
40
Q

describe the location of the pterygoid part of the maxillary artery

A

ascends adjacent (superficial OR deep) to lateral pterygoid m

41
Q

name the branches of the pterygoid part of the maxillary artery

A
  1. artery to masseter
  2. deep temporal aa
  3. pterygoid aa
  4. buccal a
42
Q

describe the location of the pterygo-palatine part of the maxillary artery

A

through pterygomaxillary fissure into pterygopalatine fossa

43
Q

name the branches of the pterygo-palatine part of the maxillary artery

A
  1. descending palatine
  2. superior alveolar (posterior, middle, anterior)
  3. infraorbital
  4. sphenopalatine
44
Q

where does the mandibular nerve (V3) exit the skull?

A

foramen ovale into infratemporal fossa

45
Q

what nerve runs with the inferior alveolar artery?

A

inferior alveolar n

46
Q

what nerve encircles the middle meningeal artery?

A

auriculotemporal n

47
Q

the auriculotemporal nerve supplies sensation to what areas?

A

auricle
temporal region
TMJ

48
Q

the auriculotemporal nerve carries postganglionic ____ fibers from the ____ ganglion to the ____

A
  • parasympathetic
  • otic (IX)
  • parotid gland
49
Q

the inferior alveolar nerve gives off what nerve before entering the mandibular foramen?

A

n to mylohyoid

50
Q

inferior alveolar nerve provides sensory to the ____

A

lower teeth

51
Q

what is the terminal branch of the inferior alveolar nerve?

A

mental n

52
Q

the lingual nerve is located anterior to what nerve?

A

inferior alveolar

53
Q

what is the function of the lingual nerve on its own?

A

sensory to ant 2/3 of tongue, floor of mouth, lingual gingivae

54
Q

what is the function of lingual nerve and chorda tympani?

A
  • taste to anterior 2/3 of tongue
  • preganglionic parasympathetic fibers to submandibular and sublingual salivary glands
55
Q

buccal n function

A

sensory to cheek

56
Q

the mandibular nerve (V3) gives off motor nerves to what muscles?

A

masseter
tensor veli palatini
medial pterygoid
lateral pterygoid
temporalis

NYCC Gross Anatomy 3 (27 decks)

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