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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
where is the 1st part of the maxillary artery?
before the lateral pterygoid muscle
26
where is the 2nd part of the maxillary artery?
associated with the lateral pterygoid muscle
27
where is the 3rd part of the maxillary artery?
after the lateral pterygoid muscle
28
name this branch of the maxillary artery
middle meningeal artery
29
where does the middle meningeal artery supply?
dura mater in the cranial vault through foramen spinosum
30
name this branch of the maxillary artery
inferior alveolar artery
31
where does the inferior alveolar artery supply?
lower teeth
32
name this branch of the maxillary artery
deep temporal arteries
33
name this branch of the maxillary artery
buccal artery
34
where does the buccal artery supply?
cheek
35
name this branch of the maxillary artery
posterior superior alveolar artery
36
where does the posterior superior alveolar artery supply?
upper teeth
37
name this branch of the maxillary artery
infraorbital artery
38
where does the infraorbital artery supply?
upper teeth and skin of mid face
39
name this branch of the maxillary artery
sphenopalatine artery
40
where does the sphenopalatine artery supply?
nose and palate
41
name the branches of the 1st part of the maxillary artery?
middle meningeal inferior alveoalar
42
name the branches of the 2nd part of the maxillary artery
dep temporal arteries buccal arteries
43
name the branches of the 3rd part of the maxillary artery
posterior superior alveolar artery infraorbital artery sphenopalatine artery
44
the motor and sensory root of CNV3 join where?
at foramen ovale
45
what are the parts that CNV3 is split into?
anterior posterior
46
what are the branches of the anterior division of CNV3?
buccal muscular branch deep temporal
47
name this branch of CNV3
deep temporal
48
name this branch of CNV3
muscular branches
49
name this branch of CNV3
buccal
50
what does the deep temporal branch of CNV3 innervate?
motor supply to temporalis
51
what does the buccal branch of CNV3 innervate?
sensory supply to the mucosa and skin of cheek
52
what does the muscular branch of CNV3 supply?
motor supply to the masseter and lateral pterygoid
53
what are the nerves in the posterior division of CNV3
auriculotemporal nerve inferior alveolar nerve lingual nerve
54
name 2 branches of the inferior alveolar nerve
nerve to mylohyoid mental nerve
55
name this branch of CNV3
auriculotemporal nerve
56
name this branch of CNV3
nerve to mylohyoid
57
name this branch of CNV3
inferior alveolar nerve
58
name this branch of CNV3
lingual nerve
59
what does auriculotemporal branch of CNV3 supply?
sensory supply to the tragus and temple
60
what does inferior alveolar nerve of CNV3 supply?
sensory supply to lower dental arch and mandibular labial gingiva
61
what does the nerve to mylohyoid of CNV3 supply?
motor supply to mylohyoid and anterior belly of digastric
62
what does the mental nerve of CNV3 supply?
sensory supply to chin, lower lip mucosa, gingiva of lower 3-3
63
what does the lingual nerve of CNV3 supply?
sensory supply to anterior 2/3 tongue floor of mouth mandibular lingual gingiva
64
describe the innervation of the parotid gland?
CNIX sends parasympathetic fibres to otic ganglion synapses hitches a ride with auriculotemporal branch of CNV3 to parotid gland
65
describe the innervation to the tongue, submandibular and sublingual glands
CNVII chorda tympani branches off hitches a ride with lingual nerve of CNV3
66
why is chorda tympani special?
- Parasympathetic to submandibular and sublingual glands - Special sensory (taste) from anterior 2/3 tongue and floor of the mouth
67
what innervates the lower posterior teeth?
dental branches of inferior alveolar nerve
68
what innervates the lower anterior teeth?
incisive branch of inferior alveolar nerve
69
what innervates the lower posterior buccal gingiva
buccal branch of CNV3
70
what innervates the lower anterior buccal/labial, gingiva?
mental branch of inferior alveolar nerve
71
what innervates the lingual gingiva?
lingual nerve
72
what innervates here?
buccal branch of CNV3
73
what innervates here?
mental branch of inferior alveolar nerve CNV3
74
what innervates here?
lingual nerve
75
what innervates here?
incisive branch of inferior alveolar nerve
76
what innervates here?
dental branches of inferior alveolar nerve

3 Anatomy (9 decks)

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