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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
attachments of medial pterygoid
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
innervation of medial pterygoid
CN V3 (medial pterygoid n)
27
actions of medial pterygoid
- with masseter, elevates mandible - protrusion - smaller grinding movements
28
what is the only muscle that depresses the chin (opens jaw)?
lateral pterygoid
29
what 3 muscle groups are accessory muscles of mastication?
suprahyoid infrahyoid mm of facial expression
30
action of infrahyoid muscles during mastication
fix or depress hyoid bone
31
name the components of the temporomandibular joint
- mandibular fossa of temporal bone - head (condylar process) of mandible - articular disc - stylomandibular lig - sphenomandibular lig
32
what muscle attaches to the articular disc of the TMJ?
lateral pterygoid
33
the pterygoid venous plexus is between what 2 muscles?
temporalis lateral pterygoid
34
the pterygoid venous plexus anastomoses with...
- facial v -> cavernous sinus - maxillary v
35
facial vein drains into what vessel?
common facial v (into internal jugular v)
36
maxillary artery is a terminal branch of ____
external carotid a
37
name the 3 parts of the maxillary artery
1. mandibular 2. pterygoid 3. pterygo-palatine
38
describe the location of the mandibular part of the maxillary artery
horizontal along lower border of lateral pterygoid & deep (medial) to condylar process of mandible
39
name the branches of the mandibular part of the maxillary artery
1. deep auricular a 2. anterior tympanic a 3. middle meningeal a 4. inferior alveolar a
40
describe the location of the pterygoid part of the maxillary artery
ascends adjacent (superficial OR deep) to lateral pterygoid m
41
name the branches of the pterygoid part of the maxillary artery
1. artery to masseter 2. deep temporal aa 3. pterygoid aa 4. buccal a
42
describe the location of the pterygo-palatine part of the maxillary artery
through pterygomaxillary fissure into pterygopalatine fossa
43
name the branches of the pterygo-palatine part of the maxillary artery
1. descending palatine 2. superior alveolar (posterior, middle, anterior) 3. infraorbital 4. sphenopalatine
44
where does the mandibular nerve (V3) exit the skull?
foramen ovale into infratemporal fossa
45
what nerve runs with the inferior alveolar artery?
inferior alveolar n
46
what nerve encircles the middle meningeal artery?
auriculotemporal n
47
the auriculotemporal nerve supplies sensation to what areas?
auricle temporal region TMJ
48
the auriculotemporal nerve carries postganglionic ____ fibers from the ____ ganglion to the ____
- parasympathetic - otic (IX) - parotid gland
49
the inferior alveolar nerve gives off what nerve before entering the mandibular foramen?
n to mylohyoid
50
inferior alveolar nerve provides sensory to the ____
lower teeth
51
what is the terminal branch of the inferior alveolar nerve?
mental n
52
the lingual nerve is located anterior to what nerve?
inferior alveolar
53
what is the function of the lingual nerve on its own?
sensory to ant 2/3 of tongue, floor of mouth, lingual gingivae
54
what is the function of lingual nerve and chorda tympani?
- taste to anterior 2/3 of tongue - preganglionic parasympathetic fibers to submandibular and sublingual salivary glands
55
buccal n function
sensory to cheek
56
the mandibular nerve (V3) gives off motor nerves to what muscles?
masseter tensor veli palatini medial pterygoid lateral pterygoid temporalis

NYCC Gross Anatomy 3 (27 decks)

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