Anatomy Final- Temporal Fossa

Front 1

what a is divided based on the lateral pterogoid mm

Back 1

Maxillary (terminal branch of ext carotid)

1. inf alveolar A & Middle Meningeal A
2. Muscular Branches
3. deep in skull, enters pterogopalatine. supplies maxillia and nasal cavity

Front 2

how can you ID middle meningeal

Back 2

branch of maxillary (1st portion)
runs internal to pteroid, enters through foramen spinosum
the auricuotemporal N wraps around it

Front 3

what NV bundle runs in mandibular foramen?

Back 3

inferior alveolar A (mylohyoid branch)
inferior alveolar N

Front 4

what is the course of inf alveolar A

Back 4

external carotid --> maxillary A --> 1st portion, inferior alveolar A --> runs in ramus, through mandibular foramen

Front 5

what happens to maxillary A as it courses medially

Back 5

crosses deep to mandible on lateral pterygoid, gives off branches.

enters pterygopalatine space btwn cranium and facial skeleton and branches to superior alveolar a amd infraorbital A

Front 6

what/where does pterygoid venous plexus drain

Back 6

the cheeck area near maxillary A

the pterygoid plexus drains to maxillary vv, they connect with superficial temporal v to form the retromandibular v, retromandibular drains to internal AND external carotid

**also can drain to cavernous sinus

Front 7

what can be a problematic drainage pattern of the pterygoid plexus

Back 7

canvernous sinus...get clarification?!!?!

Front 8

where does the mandibular N (CN V3) enter the temporal fossa

Back 8

foramen ovale

Front 9

what runs int he foramen ovale

Back 9

CN V3

Front 10

what N fibers are carred in CNV3

Back 10

SE: mm of mastication
SA: sensory, pain, touch temp

Front 11

tell me about the auriculotemporal N

Back 11

branch of CN V3
hugs middle meningeal

CN V comes out of foramen ovale and gives off auriculotemporal N which then goes superficial anterior to EAM

Front 12

what does the auricuotemporal N supply, functional (SE, SA, VE, VA) and fiber type

Back 12

SA: ear lobe, tympanic membrane, EAM, skin, TMJ, Parotid Gland

Front 13

name 5 big branches of CN V3

Back 13

1. Auriculotemporal
2. inferior alveolar N
3. N to Mylohyoid
4. Lingual
5. Buccal

Front 14

Tell me about inf alveolar N, course, foramen, what is carried on it

Back 14

SA: (pain temp touch) teeth/assoc tissue

*inf alv N is a branch of CN V3 it enters mandibular foramen and exits mental foramen, it is mental N when it exits mental foramen

Front 15

what is the only mm that is supplied by the CN V3 that isnt a mm of mastication

Back 15

CN V3 --> inf alveolar --> n to mylohyoid

N to mylohyoid supplies mylohyoid and anterior belly of digastric

N to mylohyoid does SE for mylohyoid and ant gastric

SE from V3 includes (My ass meets the toilet): mylohyoid, mm mastication, tensor veli palatini, tensor tympani

Front 16

what is the innervation of digastric

Back 16

Ant: CNV3
Post: CN VII

Front 17

what does SA to tongue, what does VA to the tongue

*anterior 2/3

Back 17

SA: pain temp touch. Lingual (CN V3)
VA: taste. facial N (CN VII)

Front 18

tell me about the lingual N

Back 18

its a branch of CN V3
contributes to chorda tympani
does temp, touch, pain to front of tongue..SA

Front 19

the chorda tympani is made from what two N?

Back 19

from lingual (CN V3) and facial (CN VII)

* it carries taste (VA) to the ant 2/3 of tongue, it also carries VE pregang para to submandibular ganglion)

Front 20

what 3 CN are involved in taste?

Back 20

1. Chorda Tympani: (from 7 travels on 5)

Front 21

what is the branch of CN V3 that supplies the cheek

Back 21

the buccal branch off of mandibular N, lies on buccinator

**sesnory to the skin/MUCOSA of the cheek

**Recall: CN VII has a MOTOR branch called buccal

Front 22

how is CN V3 anestetized. what must you be careful for?

Back 22

extraoral injection at mandibular notch (blocks SE and SA)

**the parotid gland and CN VII are near.. BE CAREFUL!

Front 23

how can you anestetize JUST hte inferior alveolar part of CN V3? landmark to help find it?

Back 23

intraoral injection near mandibular foramen.

**look for lingula, its palpable
*anestetizes the teeth and tissue in lower jaw, (SA, pain temp, touch)

Front 24

what is the otic ganglion, where is it,

Back 24

inferior to foramen ovale
medial to CN V3
parasympathetic ganglion in the infratemporal fossa
post gang para

COPS 3977

Front 25

tell me about the lesser petrosal N

Back 25

Innervates parotid, VE

From CN IX

carries parasymp, it leaves typmanic plexus and synapses in otic ganglion, the post gang para travel on auroculotemporal to get to the parotid

Front 26

what N brings pregang para? what N carries post gang para away

Back 26

Brings: lesser petrosal (CN IX)
Leaves: Auriculotemporal (CN V3)

Front 27

what type of joint is the TMJ

Back 27

Synovial
Modified Hinge, allows us to open wide (sliding/hinge)

*loose articular capsule

Front 28

what are 2 ligs that reinforce the TMJ posteriorly, why is post protection important

Back 28

1. joint capsule
2. lateral TM lig (from back of condylar process to zyg arch)

**important to prevent post movemnet of TMJ to protect EAM (CN VII)

Front 29

what seperates the TMJ into sup/inf cavities? what is each cavity responsible for?

Back 29

Fibrocartilaginous Disc

Superior: sliding, stick jaw in and out

Inferior: hinge, depression, elevation

**both are synovial

Front 30

what mm pulls the fibrocartilaginous articular disc forward?

Back 30

lateral pterygoid, pulls the jaw forward out the the joint so that it can open wider

**recall lateral pterygoid does protusion, depression and side to side

Front 31

what group of mm acts on TMJ

Back 31

mm of mastication

*masseter, medial pterygoid, lateral pterygoid, buccinator

Front 32

what depressed the jaw

Back 32

gravity
suprahyoid, infrahyoid mm
lateral pterygoid: translation, pulls the mandible out of the fossa so that the mandible can open

Front 33

what mm close the jaw

Back 33

temporalis
masseter
medial pterygoid

Front 34

what mm protude the jaw

Back 34

LATERAL PTERYGOID
masseter
medial sterygoid

Front 35

what mm retrude the jaw

Back 35

temporalis
masseter (deep fibers)

Front 36

what can cause ant dislocation of TMJ

Back 36

big mouth

*excessive lateral pterygoid contraction: yaning, big bites

Front 37

what can cause lateral dislocation of TMJ

Back 37

blow to side of head

Front 38

what can cause/prevent post dislocation of TMJ

Back 38

rare due to lateral TM lig
caused with large blow, broken mandible

**endangers CN VII and auriculotemporal N (CN V3)

Front 39

what happens at the TMJ when auriculotemporal N is damaged

Back 39

loose TMJ proprioception and cause laxity

*lateral TM lig damage

Front 40

what happens when CN V3 is lesioned

Back 40

weak mm of mastication
parasthesia of mandible

**when you open your mouth, it deviates to the lesioned side

Front 41

where is the foramen ovale? what passes through it?

Back 41

medial and ant to foramen spinosum in the sphenoid bone

CN V3

Front 42

where is the foramen spinosum? what passes through

Back 42

on sphenoid, medial to styloid process, post to foramen ovale

Middle meningeal

Front 43

what mm attaches to the pterygoid plates in the ________ (bone)?

Back 43

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Front 44

what is the depression btwn the medial/lateral pterygoid plates called?

Back 44

scaphoid fossa

on sphenoid bone BL, medially

Front 45

what 4 bones make the temporal fossa? where do they connect

Back 45

Pariteal, frontal, greater wing of sphenoid, temporal

Pterion

Front 46

does the temporal fossa have an inferior border?

Back 46

nope, its continuous with infratemporal fossa

Front 47

what are the boundaries of the temporal fossa

Back 47

sup/post temporal lines
anteriorly, ridge on frontal/zygomatic bones
zygomatic arch
infratemporal fossa
temporal fascia

Front 48

what is a clinical concern for middle meningeal

Back 48

blow to pterion will rupture it

foramen spinosum, lies inside cranium, branch of maxillary

Front 49

what is the course of middle meningeal a

Back 49

ex carotid --> maxillary --> middle meningeal ---foramen spinosum---> internal cranium lies at pterion

Front 50

what does the temporalis attach to? what is its fx

Back 50

temporal fascia, resist masseter

*temporalis retracts mandible
*masseter protudes mandible

Front 51

what vessels lie on temporalis

Back 51

superficial temporal a/v

Front 52

what happens to temporal facia at zygomatic arch?

Back 52

splits to stabilize zygomatic arch against masseter

Front 53

what is the action/innervation of temporalis

Back 53

Action: retract mandible, elevate

CN V3, motot (SE) ALL mm of mastication are innervated by CN V3

Front 54

what is the motor branch of trigeminal? what group of mm does it innervate

Back 54

CN V3 (mandibular branch)

innervates mm of mastication

(My Ass Meets the Toilet: Mylohyoid, ant digastric, mm of mastication, tensor veli palatini, tensor tympani)

Front 55

mm that act on TMJ and their innercation

Back 55

MM of mastication:
temporalis
masester
lateral pterygoid
medial pterygoid

**CN V3, SE

Front 56

what is the action of the masseter

Back 56

protude mandible
elevate mandible

**resisted by temporalis

temporalis: retract
masseter: protrude

Front 57

where does the masseter attach

Back 57

angle of mandible
anterior zygomatic arch

Front 58

what does the later pterygoid do

Back 58

side to side
protrude
depress

Front 59

where does the lateral pterygoid attach

Back 59

head of condyler process

Front 60

when lateral pterygoid is contracted UL what happens

Back 60

side to side

Front 61

what are the actions of medial pterygoid

Back 61

elevate
protrude
side to side

Front 62

where are the lateral/medial pterygoid relative to mandible

Back 62

deep

Front 63

where is scaphoid fossa?
internal view of mandible/inferior view of skull

Back 63

?>??????????????

Front 64

what are the relationships of masseter, medial pterygoid mm fibers

Back 64

parallel