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Neuro Exam 3 > Infratemporal Fossa > Flashcards

Infratemporal Fossa Flashcards

1
Q

temporal fossa

A

overlying frontal, parietal, temporal, and sphenoid bones

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2
Q

boundaries temporal fossa

A

superior temporal line - zygomatic, frontal, parietal, temporal bones

zygomatic arch
infratemporal crest of temporal and sphenoid bones

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3
Q

contents of temporal fossa

A

upper temporalis muscle and dense temporalis fascia

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4
Q

infratemporal fossa

A

inferior and deep to temporal region

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5
Q

lateral border of infratemporal fossa

A

ramus of mandible

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6
Q

superiolateral border of infratemporal fossa

A

zygomatic arch

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7
Q

superomedial border of infratemporal fossa

A

infratemporal crest of temporal and sphenoid bones

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8
Q

medial border of infratemporal fossa

A

lateral pterygoid plate of sphenoid and pharynx

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9
Q

anterior border of infratemporal fossa

A

maxilla

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10
Q

posterior border of infratemporal fossa

A

imaginary line connecting posterior border of ramus of mandible and styloid process of temporal bone

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11
Q

inferior border of infratemporal fossa

A

continuous with submandibular region

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12
Q

contents of infratemporal fossa

A 
temporalis muscle
medial pterygoid
lateral pterygoid
maxillary artery portion 1 and 2
pterygoid plexus of veins
mandibular division of CN V - V3
otic ganglion
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13
Q

tempomandibular joint

A

articulation between mandible condyle and mandibular fossa temporal bone

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14
Q

joint capsule of TMJ

A

loose above disc and tight below disc

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15
Q

articular disc

A

dense CT

-separates joint to two synovial lined cavities

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16
Q

lateral ligament of TMJ

A

thickening of joint capsule

-helps prevent posterior dislocation of mandible

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17
Q

stylomandibular ligament

A

thickening of parotid fascia

  • styloid to angle of mandible
  • not very strong
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18
Q

sphenomandibular ligament

A

spine of sphenoid to lingula of mandible

-strong - most of support to TMJ

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19
Q

most of support to TMJ

A

sphenomandibular ligament

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20
Q

upper joint

A

temporal bone and disc

  • gliding
  • allows protrusion/retrusion and elevation/depression
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21
Q

lower joint

A

disc and mandibule

  • pivot type
  • side to side during chewing
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22
Q

dislocated TMJ

A

mandibular condyles slide too far anteriorly
-inability to close jaw

may damage auriculotemporal nerve

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23
Q

nerve damaged with dislocated TMJ

A

auriculotemporal nerve

-branch of mandibular nerve

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24
Q

muscles of mastication

A

from arch 1
innervated by V3

temporalis, masseter, medial pterygoid, lateral pterygoid

25
Q

temporalis

A

temporal line to coronoid process anterior surface ramus of mandible

elevate and retract jaw

26
Q

temporalis innervation

A

anterior deep temporal n. - elevates mandible

posterior deep temporal n. - retracts mandible

27
Q

temporobuccinator band

A

fascial band spans from temporalis tendon to buccinator muscle

pulls buccinator away from teeth when bite down
-dont bite cheek

28
Q

masseter

A

zygomatic arch to external ramus of mandible

elevates mandible
assists with protrusion

29
Q

masseter innervation

A

V3 via masseteric branches

30
Q

medial pteryoid muscle

A

medial surface lateral pterygoid plate and tuberosity of maxilla to internal surface of mandible ramus

elevates mandible and assists protrusion
also, pivot type movements of mandible

31
Q

innervation medial pterygoid

A

V3 via medial pterygoid branch

32
Q

lateral pterygoid muscle

A

lateral surface of lateral pterygoid plate and infratemporal crest of sphenoid bone to neck of mandibualr condyle/articular disc

protrusion of mandible

33
Q

lateral pterygoid unilateral action

A

moves jaw towards contralateral side

-pivot movements of chewing

34
Q

innervation lateral pterygoid

A

V3 via lateral pterygoid branch

35
Q

sphenomeniscal portion of lateral pterygoid

A

to articular disc - stabilizes**

36
Q

maxillary artery

A

from external carotid artery

posterior to neck of mandible

3 portions

  • mandibular
  • pterygoid
  • pterygopalatine
37
Q

mandibular portion of maxillary artery

A

deep to neck of mandible 1st portion

deep auricular a
anteiror tympanic a
middle meningeal a
accessory meningeal a
inferior alveolar a
38
Q

pterygoid portion of maxillary artery

A

through infratemporal region - either superficial/deep

masseteric branches
anterior and posterior deep temporal 
medial pterygoid branches
lateral pterygoid branches
buccal artery - to cheek
39
Q

pterygopalatine portion of maxillary artery

A

through pterygomaxillary fissure to enter PPF

in later notes

40
Q

branches of maxillary artery

A 
deep auricular
anterior tympanic
middle meningeal 
accessory meningeal
inferior alveolar
masseteric branches
anterior deep temporal
posterior deep temporal
medial pterygoid branches
lateral pterygoid branches
buccal artery
posterior superior alveolar a
infraorbital a
pharyngeal a
artery of pterygoid canal
descending palatine a
sphenopalatine a
41
Q

pterygoid plexus of veins

A

large venous plexus investing external and internal surface of lateral pterygoid muscle

blood from infratemporal fossa and face
also cavernous sinus (emissary veins) and pharynx

coalesce to form maxillary vein - travels with maxillary artery

42
Q

mandibular nerve

A

V3
-exits middle cranial fossa - foramen ovale

GSA
SVE
GVE-P
SVA

43
Q

GSA of V3

A

to lower portion of face

-chin, lower cheek, temporal region, mandibular teeth

44
Q

SVE of V3

A 
1st arch muscles
muscles of mastication
tensor tympani
tensor veli palatini
anterior belly digastric
mylogyoid
45
Q

GVE-P of V3

A

fibers from CN VII and CN IX to salivary glands

46
Q

SVA of V3

A

fibers from CN VII to anterior 2/3 of tongue

47
Q

GSA branches of V3

A

meningeal branch - reenters foramen spinosum
buccal n. (between two heads L pterygoid)
lingual n. (between M/L pterygoids)
auricotemporal n. - GSA to TMJ

48
Q

auriculotemporal nerve

A

GSA to TMJ, temporal region, auricle, external acoustic meatus, external tympanic membrane

also GVE-P to parotid gland

49
Q

chorda tympani

A

of CN VII

  • joins lingual nerve
  • takes SVA to anterior 2/3 tongue and GVE-P to submandibular and sublingual glands
50
Q

SVE branches of V3

A 
medial pterygoid
nerve to tensor tympani
nerve to tensor veli palatini
lateral pterygoid nn
masseteric nn
anterior and posterior deep temporal nn
51
Q

mixed branch of V3

A

GSA and SVE
-inferior alveolar n

enters mandibular foramen

  • mental n. exits mental foramen
  • mylohyoid n. - before enters mandible, SVE to mylohyoid and anterior belly digastric
52
Q

mandibular nerve block

A

around main trunk of mandibular nerve

53
Q

inferior alveolar nerve block

A

to anesthetize mandibular teeth

-near entrance of mandibular foramen

54
Q

parasympathetic to parotid gland

A

GVE-P preganglionic with CN IX - to middle ear
-exits as lesser petrosal nerve

  • synapses in otic ganglion
  • postganglionic - travel with auriculotemporal nerve of V3
55
Q

PS to parotid

A

stimulate salivation

56
Q

parasympathetic to sublingual and submandibular

A

preganglionic - CN VII
-chorda tympani

joins lingual nerve

synapse submandibular ganglion

postganglionic - lingual branch of V3

57
Q

lesion of chorda tympani

A

lose taste and dry mouth (no SM/SL gland)

58
Q

auriculotemporal n

A

branch of V3

carries postganglionic GVE-P from CN IX to parotid gland

59
Q

lingual n

A

branch of V3

carries postganglionic GVE-P from CN VII to SL/SM gland

Neuro Exam 3 (15 decks)

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