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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
temporalis
temporal line to coronoid process anterior surface ramus of mandible elevate and retract jaw
26
temporalis innervation
anterior deep temporal n. - elevates mandible | posterior deep temporal n. - retracts mandible
27
temporobuccinator band
fascial band spans from temporalis tendon to buccinator muscle pulls buccinator away from teeth when bite down -dont bite cheek
28
masseter
zygomatic arch to external ramus of mandible elevates mandible assists with protrusion
29
masseter innervation
V3 via masseteric branches
30
medial pteryoid muscle
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
innervation medial pterygoid
V3 via medial pterygoid branch
32
lateral pterygoid muscle
lateral surface of lateral pterygoid plate and infratemporal crest of sphenoid bone to neck of mandibualr condyle/articular disc protrusion of mandible
33
lateral pterygoid unilateral action
moves jaw towards contralateral side | -pivot movements of chewing
34
innervation lateral pterygoid
V3 via lateral pterygoid branch
35
sphenomeniscal portion of lateral pterygoid
to articular disc - stabilizes**
36
maxillary artery
from external carotid artery posterior to neck of mandible 3 portions - mandibular - pterygoid - pterygopalatine
37
mandibular portion of maxillary artery
deep to neck of mandible 1st portion ``` deep auricular a anteiror tympanic a middle meningeal a accessory meningeal a inferior alveolar a ```
38
pterygoid portion of maxillary artery
through infratemporal region - either superficial/deep ``` masseteric branches anterior and posterior deep temporal medial pterygoid branches lateral pterygoid branches buccal artery - to cheek ```
39
pterygopalatine portion of maxillary artery
through pterygomaxillary fissure to enter PPF | **in later notes**
40
branches of maxillary artery
``` 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
pterygoid plexus of veins
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
mandibular nerve
V3 -exits middle cranial fossa - foramen ovale GSA SVE GVE-P SVA
43
GSA of V3
to lower portion of face | -chin, lower cheek, temporal region, mandibular teeth
44
SVE of V3
``` 1st arch muscles muscles of mastication tensor tympani tensor veli palatini anterior belly digastric mylogyoid ```
45
GVE-P of V3
fibers from CN VII and CN IX to salivary glands
46
SVA of V3
fibers from CN VII to anterior 2/3 of tongue
47
GSA branches of V3
meningeal branch - reenters foramen spinosum buccal n. (between two heads L pterygoid) lingual n. (between M/L pterygoids) auricotemporal n. - GSA to TMJ
48
auriculotemporal nerve
GSA to TMJ, temporal region, auricle, external acoustic meatus, external tympanic membrane also GVE-P to parotid gland
49
chorda tympani
of CN VII - joins lingual nerve - takes SVA to anterior 2/3 tongue and GVE-P to submandibular and sublingual glands
50
SVE branches of V3
``` medial pterygoid nerve to tensor tympani nerve to tensor veli palatini lateral pterygoid nn masseteric nn anterior and posterior deep temporal nn ```
51
mixed branch of V3
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
mandibular nerve block
around main trunk of mandibular nerve
53
inferior alveolar nerve block
to anesthetize mandibular teeth | -near entrance of mandibular foramen
54
parasympathetic to parotid gland
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
PS to parotid
stimulate salivation
56
parasympathetic to sublingual and submandibular
preganglionic - CN VII -chorda tympani joins lingual nerve synapse submandibular ganglion postganglionic - lingual branch of V3
57
lesion of chorda tympani
lose taste and dry mouth (no SM/SL gland)
58
auriculotemporal n
branch of V3 carries postganglionic GVE-P from CN IX to parotid gland
59
lingual n
branch of V3 | carries postganglionic GVE-P from CN VII to SL/SM gland

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