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neuro exam 2 > infratemporal fossa > Flashcards

infratemporal fossa Flashcards

1
Q

temporal fossa

A

lat area of skull overlying squamous portions of frontal, parietal, temporal, and sphenoid bones.
continuous inf w/infratemporal fossa

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2
Q

boundaries of temporal fossa

A

ant/sup/post- sup temporal line
inferolateral- zygomatic arch
inferomedial- infratemporal crest of temporal and sphenoid bones

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3
Q

sup temporal line

A

zygomatic, frontal, parietal, temporal

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4
Q

contents of temporal fossa

A

upper portin of temporalis m and a dense temporalis fascia

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5
Q

infratemporal fossa

A

deep region of the head lying inf and deep to temporal region

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6
Q

boundaries of infratemporal fossa

A

lat- ramus of mandible
superolateral- zygomatic arch
superomedial-infratemporal crest of temporal and sphenoid bones
med- lateral pterygoid plate & pharynx
ant- maxilla
post- imaginary line connecting post border of ramus of mandible and styloid process of temporal bone
inf- continuous w/submandibular region

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7
Q

contents of infratemporal fossa

A 
lower portion of temporalis m
medial pterygoid
lat pterygoid
maxillary a (1st and 2nd portion)
pterygoid plexus of vv
V3
otic ganglion
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8
Q

TMJ

A

condyle of mandible
mandibular fossa and articular tubercle of temporal
contains dense CT articular disc- separates joint into 2 separate synovial lined cavities
loose above disc, tight below

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9
Q

TMJ fnx

A

operates during chewing

while opening mouth condyle of mandible slides ant against post surface of articular tubercle

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10
Q

ligs of TMJ

A

lat lig of TMJ
stylomandibular lig
sphenomandibular lig

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11
Q

lat lig of TMJ

A

thickening of joint capsule

helps to prevent post dislocation of mandible

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12
Q

sytlomandibular lig

A

thickening of parotid fascia
extends from styloid process to angle of mandible
not very strong

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13
Q

sphenomandibular lig

A

extends from spine of sphenoid to lingula of mandible

strong, provides the most passive support for TMJ

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14
Q

elevation of mandible

A

close mouth
temporalis
masseter
medial pterygoid

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15
Q

depression of mandible

A

open mouth

lateral pterygoid, suprahyoid, infrahyoid

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16
Q

protrusion of mandible

A

lateral pterygoid, masseter, and medial pterygoid

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17
Q

retrusion of mandible

A

temporalis, masseter

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18
Q

lat movement of mandible

A

temporalis same side, pterygoids opposit side, masseter

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19
Q

upper portion TMJ

A 
synovial
btwn temporal bone and disc
gliding
protrusion/retrusion
elevation/depression
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20
Q

lower portion TMJ

A

synovial
btwn disc and mandible
pivot
side to side motion

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21
Q

dislocation of TMJ

A

mandibular condyle slide ant to articular tubercle (too far) -> unable to close jaw
must be pushed inf then post
may damage auriculotemporal n

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22
Q

mm of masitcatin

A

1st pharyngeal arch

V3

23
Q

temporalis

A
  • temporal lines and deep tmeporal fascia/infratemporal crest
  • cornoid process and ant ramus of mandible
  • elvates and retracts jaw
  • ant and post deep temporal nn V3
24
Q

temporobuccinator band

A

specialization of temporalis m
dense fascial band spans from temporalis tendon to buccinator
pull buccinator away from teeth

25
Q

masseter

A

zygomatic arch
external surface of ramus of mandible
elevates and protrusion of mandible
masseteric brr of V3

26
Q

medial pterygoid

A

medial sruface of lat pterygoid plate and tuberosity of maxilla
internal surface ramus of mandible
elevates and protrusion and pivot motions of mandible
medial pterygoid br of V3

27
Q

maxillary a

A

terminal br of external carotid

courses post to neck of mandible

28
Q

3 portions of maxillary a

A

mandibular
pterygoid
pterygopalatine

29
Q

mandibular portion of maxillary

A 
courses deep to neck of mandible
brr:
deep auricular 
ant tympanic
middle menigeal
accessory menigeal 
inf alveolar
30
Q

deep auricular a

A

external acoustic meatus
outer tympatic membrane
TMJ

31
Q

ant tympanic a

A

inner tympanic membrane

courses thru petrotympanic fissue to reach middle ear

32
Q

middle menigeal a

A

enters middle cranial fossa via foramen ovale to supply dura and skull

33
Q

inf alveolar a

A

enters mandibular foramen to supply mandible, mandibular teeth, and chin via mental a
gives rise to mylohyoid a

34
Q

pterygoid portion

A 
courses thru infratemporal region either superficial or deep to lateral pterygoid m
brr
masseteric brr
ant and post deep temporal
medial pterygoid br
lat pterygoid br
buccal a supplies cheek
35
Q

pterygopalatine portion

A 
courses thru pterygomaxillary fissure to enter pterygopalatine fossa
brr
post sup alveolar 
infraorbital
pharyngeal
a of pterygoid canal
descending palatine
sphenopalatine
36
Q

pterygoid plexus of vv

A

external and internal surface of lateral pterygoid
receives blood from:
-infratemporal fossa and nasal cavity via venae comitantes of maxillary a
-face via deep facial v and ophthalmic vv
-cavernous sinus via emissary vv
-pharynx via pharygeal vv
coalesces to form maxillary v which exits infratemporal fossa traveling w/maxillary a

37
Q

V3

A

exits via foramin ovale to enter infratemporal fossa

38
Q

GSA of V3

A

lower portion of face, external acoustic meatus, floor of oral cavity, ant 2/3s tongue, dura of middle cranial fossa

39
Q

SVE of V3

A 
mm of mastication
tensor tympani
tensor veli palatini
ant diagastric
mylohyoid
40
Q

GVE-P V3

A

distributes from VII & IX to salivary glans

41
Q

SVA V3

A

distributes from VII to ant 2/3s of tongue

42
Q

GSA brr of V3

A

meningeal
buccal
lingual
auriculotemporal

43
Q

meningeal br V3

A

re-enters middle cranial fossa via foramen spinosum

supplies dura of middle cranial fossa

44
Q

buccal n V3

A

exits infratemporal region by passing btwn 2 heads of lateral pterygoid
pierces mucosa of cheek to supply cheek

45
Q

lingual n

A

exits infratemporal region by passing btwn medial and lat pterygoids
travels to oral cavity
supplies ant 2/3s tongue, floor of oral cavity, and mandibular gingivae

46
Q

chordae tympani

A

VII

joins lingual to carry taste and GVE-P to submandibular and sublingual glands

47
Q

auriculotemporal n

A

arises form 2 roots whihc surround middle meningeal a
exits infratemporal fossa post by passing deep to neck of mandible
provides GSA to temporal region, auricle, EAM, and external tympanic membrane

48
Q

motor brr of V3

A 
medial pterygoid n
n to tensor tympani
n to tensor veli palatini
lat pterygoid nn
masseteric nn
ant and post deep temproral nn
49
Q

mixed br of V3

A

inf alveolar GSA & SVE

brr mental and mylohyoid

50
Q

mandibular n block

A

needle thru mandibular notch to around main trunk of mandibular n

51
Q

inf alveolar block

A

used by dentists for mandibular teeth

injected near entrance of mandibular foramen

52
Q

preganglionic parasympathetics to sublingual and submandibular glands

A

salivatory nucleus -> travel w/VII -> chorda tympani -> lingual -> submandibular ganglion

53
Q

postganglionic parasympathetics to sublingual and submandibular glands

A

submandibular ganglion -> lingual br of V3

secretomotor

54
Q

lateral pterygoid

A

lat surface lat pterygoid plate and infratemporal crest of sphenoid bone
neck of mandibular condyle; articular disc
protrusion; acting unilateral, jaw towards contralateral side
lat pterygoid br of V3

neuro exam 2 (11 decks)

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