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3 Anatomy > Infratemporal fossa > Flashcards

Infratemporal fossa Flashcards

1
Q

what is the lateral/external boundary of the infratemporal fossa?

A

ramus of mandible

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2
Q

what is the superior boundary of the infratemporal fossa?

A

zygomatic arch
inferior surface of greater wing of sphenoid

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3
Q

what is the posterior boundary of the infratemporal fossa?

A

tympanic plate
mastoid process
styloid process

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4
Q

what is the anterior boundary of the infratemporal fossa?

A

posterior aspect of maxilla

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5
Q

what is the medial/internal boundary of the infratemporal fossa?

A

lateral pterygoid plate

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6
Q

what is the inferior boundary of the infratemporal fossa?

A

where the medial pterygoid muscle attaches to the mandible near its angle

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7
Q

what muscles are contained in the infratemporal fossa?

A

inferior part of temporalis
medial pterygoid
lateral pterygoid

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8
Q

what nerves are contained in the infratemporal fossa?

A

branches of CNV3
Chorda tympani CNVII
Otic ganglion CNIX

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9
Q

what arteries are contained in the infratemporal fossa?

A

maxillary arteries and its branches

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10
Q

what veins are contained in the infratemporal fossa?

A

pterygoid plexus

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11
Q

what is the function of the lateral pterygoid muscle?

A

opens jaw

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12
Q

what are the origins of the lateral pterygoid muscle?

A

infratemporal crest of greater wing of sphenoid (superior head)

lateral surface of lateral pterygoid plate (inferior head)

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13
Q

what are the insertions of the lateral pterygoid muscle?

A

manidbular pterygoid fovea

TMJ capsule and articular disc

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14
Q

what is the innervation to the lateral pterygoid muscle?

A

CNV3 nerve to lateral pterygoid

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15
Q

what is the function of the medial pterygoid muscle?

A

closes jaw

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16
Q

what are the origins of the medial pterygoid muscle?

A

medial surface of lateral pterygoid plate (deep head)

maxillary tuberosity

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17
Q

what are the insertions of the medial pterygoid muscle?

A

medial surface of mandibular ramus

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18
Q

what is the innervation to the medial pterygoid muscle?

A

CNV3 nerve to medial pterygoid

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19
Q

what is the pterygoid venous plexus?

A

lots of veins located in the infratemporal fossa

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20
Q

what does the pterygoid venous plexus surround?

A

lateral pterygoid muscle
maxillary artery

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21
Q

facial vein and deep facial veins drain into the ? in the pterygoid venous plexus then to the ?

A

maxillary vein
retromandibular vein

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22
Q

why is the pterygoid venous plexus clinically important?

A

it connects the superficial face to the dural venous sinuses through the superior and inferior ophthalmic vein and facial vein

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23
Q

what is the danger triangle of the face?

A

area where you can carry infection into the cranial cavity via the cavernous sinus

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24
Q

the maxillary artery is split into 3 parts that are relative to what?

A

lateral pterygoid muscle

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25
Q

where is the 1st part of the maxillary artery?

A

before the lateral pterygoid muscle

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26
Q

where is the 2nd part of the maxillary artery?

A

associated with the lateral pterygoid muscle

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27
Q

where is the 3rd part of the maxillary artery?

A

after the lateral pterygoid muscle

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28
Q

name this branch of the maxillary artery

A

middle meningeal artery

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29
Q

where does the middle meningeal artery supply?

A

dura mater in the cranial vault through foramen spinosum

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30
Q

name this branch of the maxillary artery

A

inferior alveolar artery

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31
Q

where does the inferior alveolar artery supply?

A

lower teeth

32
Q

name this branch of the maxillary artery

A

deep temporal arteries

33
Q

name this branch of the maxillary artery

A

buccal artery

34
Q

where does the buccal artery supply?

A

cheek

35
Q

name this branch of the maxillary artery

A

posterior superior alveolar artery

36
Q

where does the posterior superior alveolar artery supply?

A

upper teeth

37
Q

name this branch of the maxillary artery

A

infraorbital artery

38
Q

where does the infraorbital artery supply?

A

upper teeth and skin of mid face

39
Q

name this branch of the maxillary artery

A

sphenopalatine artery

40
Q

where does the sphenopalatine artery supply?

A

nose and palate

41
Q

name the branches of the 1st part of the maxillary artery?

A

middle meningeal
inferior alveoalar

42
Q

name the branches of the 2nd part of the maxillary artery

A

dep temporal arteries
buccal arteries

43
Q

name the branches of the 3rd part of the maxillary artery

A

posterior superior alveolar artery
infraorbital artery
sphenopalatine artery

44
Q

the motor and sensory root of CNV3 join where?

A

at foramen ovale

45
Q

what are the parts that CNV3 is split into?

A

anterior
posterior

46
Q

what are the branches of the anterior division of CNV3?

A

buccal
muscular branch
deep temporal

47
Q

name this branch of CNV3

A

deep temporal

48
Q

name this branch of CNV3

A

muscular branches

49
Q

name this branch of CNV3

A

buccal

50
Q

what does the deep temporal branch of CNV3 innervate?

A

motor supply to temporalis

51
Q

what does the buccal branch of CNV3 innervate?

A

sensory supply to the mucosa and skin of cheek

52
Q

what does the muscular branch of CNV3 supply?

A

motor supply to the masseter and lateral pterygoid

53
Q

what are the nerves in the posterior division of CNV3

A

auriculotemporal nerve
inferior alveolar nerve
lingual nerve

54
Q

name 2 branches of the inferior alveolar nerve

A

nerve to mylohyoid
mental nerve

55
Q

name this branch of CNV3

A

auriculotemporal nerve

56
Q

name this branch of CNV3

A

nerve to mylohyoid

57
Q

name this branch of CNV3

A

inferior alveolar nerve

58
Q

name this branch of CNV3

A

lingual nerve

59
Q

what does auriculotemporal branch of CNV3 supply?

A

sensory supply to the tragus and temple

60
Q

what does inferior alveolar nerve of CNV3 supply?

A

sensory supply to lower dental arch and mandibular labial gingiva

61
Q

what does the nerve to mylohyoid of CNV3 supply?

A

motor supply to mylohyoid and anterior belly of digastric

62
Q

what does the mental nerve of CNV3 supply?

A

sensory supply to chin, lower lip mucosa, gingiva of lower 3-3

63
Q

what does the lingual nerve of CNV3 supply?

A

sensory supply to
anterior 2/3 tongue
floor of mouth
mandibular lingual gingiva

64
Q

describe the innervation of the parotid gland?

A

CNIX sends parasympathetic fibres to otic ganglion
synapses
hitches a ride with auriculotemporal branch of CNV3
to parotid gland

65
Q

describe the innervation to the tongue, submandibular and sublingual glands

A

CNVII
chorda tympani branches off
hitches a ride with lingual nerve of CNV3

66
Q

why is chorda tympani special?

A
  • Parasympathetic to submandibular and sublingual glands
    • Special sensory (taste) from anterior 2/3 tongue and floor of the mouth
67
Q

what innervates the lower posterior teeth?

A

dental branches of inferior alveolar nerve

68
Q

what innervates the lower anterior teeth?

A

incisive branch of inferior alveolar nerve

69
Q

what innervates the lower posterior buccal gingiva

A

buccal branch of CNV3

70
Q

what innervates the lower anterior buccal/labial, gingiva?

A

mental branch of inferior alveolar nerve

71
Q

what innervates the lingual gingiva?

A

lingual nerve

72
Q

what innervates here?

A

buccal branch of CNV3

73
Q

what innervates here?

A

mental branch of inferior alveolar nerve CNV3

74
Q

what innervates here?

A

lingual nerve

75
Q

what innervates here?

A

incisive branch of inferior alveolar nerve

76
Q

what innervates here?

A

dental branches of inferior alveolar nerve

3 Anatomy (9 decks)

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