Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Neuro III > Infratemporal Fossa > Flashcards

Infratemporal Fossa Flashcards

1
Q

Where is the temporal fossa

A

lateral area of skull overlaying squamous portions of frontal, parietal, temporal and sphenoid bones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the boundaries of the temporal fossa

A

anterior/superior/posterior: superior temporal line (zygomatic, frontal, parietal and temporal bones)
inferior (lateral) zygomatic arch
inferior (medial) infratemporal crest of temporal and sphenoid bones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are the contents of the temporal fossa

A

upper portion temporalis m and dense temporalis fascia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Where is the infratemporal fossa

A

deep region of head lying inferior and deep to temporal region

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what are the boundaries of the infratemporal fossa

A

lateral-ramus of mandible
superior lateral- zygomatic arch
superior medial- lateral pterygoid plate of sphenoid bones
medial- lateral pterygoid plate of sphenoid and pharynx
anterior- maxilla
posterior- imaginary line connecting posterior border of ramus of mandible and styloid process of temporal bone
inferior- continuous with submandibular region

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what are the general contents of the infratemporal fossa

A 
lower portion of temporal is m
medial pterygoid
lateral pterygoid
maxillary a (1st and 2nd portion)
pterygoid plexus of vv
mandibular division of CN V or V3
otic ganglion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where is the TMJ

A

condyle of mandible

temporal bone- mandibular fossa and articular tubercle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

which way does the condyle of mandible move when opening mouth

A

anteriorly against posterior surface of articular tubercle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is within the TMJ between bones

A

dense CT articular disc that separates joint into two separate synovial lined cavities

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Where is the joint capsule of TMJ tight? loose?

A

tight below disc

loose above disc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the ligaments in the TMJ

A

lateral ligament
stylomandibular ligament
spehnomandibular ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the role of the lateral ligament of TMJ

A

thickening that helps prevent posterior dislocation of mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the role of the stylomandibular ligament

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is the role of the sphenomandibular ligament

A

extends from spine of sphenoid to lingula of mandible

strong ligament and prvides most passive support for TMJ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What type of movements does theupper portion of synovial joint of TMJ allow

A

gliding

protrusion/retrusion and elevation/depression

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what type of movements does the lower portion of synovial joint of TMJ allow

A

pivot type movements between disc and mandible

side to side during chewing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What causes dislocation of TMJ

A

mandibular condyle slides too far forward and results in inability to close jaw

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what corrects TMJ dislocation

A

inferiorly and posteriorly to correct

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what n can be damaged by dislocation of TMJ

A

auriculotemporal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What pharyngeal arch do the mm of mastication come from

A

1st because all from V3 trigeminal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

o i action inn temporalis m

A

o: temporal lines and deep temporal fascia/infratemporal crest
i: coronoid process and anterior surface ramus mandible
action: elevates(closes)retracts jaw
inn V3 via anterior and posterior deep temporal nn

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what are the special features of the temporalis

A

temporobuccinator band
dense fascial band that spans from temporalis tendon to buccinator m
function- pulls buccinator m away from teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

o i action inn masseter

A

o: zygomatic arch
insertion: external surface of ramus of mandible
action: elevates(closes) mandible and assists with protrusion
inn: V3 via masseteric branches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

o i action inn medial pterygoid

A

o: medial surface lateral pterygoid plate (deep head) and tuberosity of maxilla (superficial head)
i: internal surface of ramus of mandible
action: elevates (closes) mandible and assists with protrusion and pivot movements of mandible
inn: V3 via medial pterygoid branch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

o i action inn lateral pterygoid

A

o: lateral surface of lateral pterygoid plate (deep head) infra temporal crest of sphenoid bone (superficial head)
i: neck of mandibular condyle (deep portion), articular disc( superficial; sphenomeniscal portion)
action: protrusion of mandible, acting unilateral, moves jaw towards contralateral side to produce pivot movements of chewing (side to side)
inn: V3- lateral pterygoid branch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Where does the maxillary course prior to entering infratemporal fossa

A

posterior to neck of mandible (between sphenomandibular ligament)

27
Q

what are the 3 portions of the maxillary a

A

mandibular, pterygoid and pterygopalatine

28
Q

What are the branches off the mandibular portion of maxillary a

A 
deep auricular
anterior tympanic
middle meningeal a
accessory meningeal a
inferior alveolar
29
Q

what does the deep auricular a supplu

A

external acoustic meatus, outer TM, and TMJ

30
Q

what does the anterior tympanic a supply

A

inner tympanic membrane (courses through petrotympanic fissure to reach middle ear)

31
Q

what does the middle meningeal a supply

A

dura and skull

32
Q

what does the accessory meningeal a supply

A

dura and skull

33
Q

what does the inferior alveolar supply

A

mandible, teeth, chin and gives rise to mylohyoid a before entering mandibular foramen

34
Q

where does the pterydoid portion of pterygoi a course

A

either superficial or deep to the lateral pterygoid m

35
Q

what are the branches off the pterygoid portion of pterygoid a

A 
masseteric
anterior and posterior deep temporal
medial pterygoid
lateral pterygoid
buccal a
36
Q

what are the branches of the pterygopalatine portion of pterygopalatine a

A 
posterior superior alveolar a
infraorbital
pharyngeal
a of pterygoid canal
descending palatine a
sphenopalatine a
37
Q

Where is the pterygoid plexus

A

investing external and internal surface of lateral pterygoid muscle

38
Q

what other vv does pterygoid plexus communicate with

A

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 pharyngeal vv

39
Q

what does the pterygoid plexus join with

A

coalesces to form maxillary vein

40
Q

What type of fibers are carried in V3

A

GSA to lower face
SVE to mm mastication
GVE-P from VII and IX to salivary glands
distributes SVA fibers from VII to anterior 2/3 tongue

41
Q

What are the sensory branches of V3

A

Meningeal, buccal, lingual, auriculotemporal

42
Q

where is the buccal branch V3 and what does it inn

A

exits infratemporal region by passing between heads of lateral pterygoid m and pierces mucosa of cheek to supply cheek gingiva

43
Q

where is the lingual branch of V3 and what does it suppl

A

passes between medial and lateral pterygoid mm
travels to oral cavity
supplies anterior 2/3 tongue, floor cavity and mandibular gingiva

44
Q

What runs in chorda tympani

A

SVA for anteior 2/3 taste and GVE-P to submandibular and sublingual glands

45
Q

Where is the auriculotemporal n and what inn does it carry

A

arises from 2 roots which surround middle meningeal a
exits infratemporal fossa posteriorly by passing deep to neck
provides GSA to TMJ. temporal region, auricle, external auditory meatus and external TM

46
Q

which n distributes GVE-P to parotid gland

A

the auriculotemporal n

47
Q

What are the motor branches of V3

A 
medial pterygoid n
nerve to tensor tympani
nerve to tensor veli palatini
lateral pterygoid nn
masseteric nn
anterior and posterior deep temporal nn
48
Q

What nerve is the mixed branch of V3

A

Inferior alveolar with a mental n and mylohyoid n

49
Q

what type of infor does the inferior alveolar n carry

A

GSA and SVE

50
Q

What do dentists use to anesthetize mandibular teeth

A

inferior alveolar n block

51
Q

What ganglion are the GVE-P fibers to partodi going to first

A

otic ganglion

52
Q

Where is the otic ganglion

A

suspended from V3 lies deep to main trunk V3
contains cell bodies of postganglionic PANs
inn parotid

53
Q

where are the preganglioninc PANs cell bodies for parotid gland

A

salivatory nucleus in brainstem

54
Q

what n do the PANs preganglionic fibers run with to get to parotid gland

A

IX

55
Q

as IX exits jugular foramen describe the course of its tympanic branch

A

enters middle ear via tympanic canaliculus and then travels thru to reform as lesser petrosal n which exits hiatus and enters foramen ovale to synapse on otic ganglion

56
Q

Where are the cell bodies for the PANs postganglionics

A

otic ganglion

57
Q

what n to the postganglionic PANs fibers to parotdi gland run iwith

A

auriculotemporal n

58
Q

what is the function of PANs to parotid

A

secretomotor and stimulation of salivation

59
Q

What n do PAN preganglionics travel with to get to sublingual and submandibular glands

A

VII

60
Q

what is the course of VII PAN fibers

A

give rise to chorda tympani which exits middle ear thru petrotympanic fissure and enters infratemporal fossa where it joins with lingual n
these synapse in submandibular ganglion

61
Q

where are the PAN postganglionic cell bodies to sublingual and submandibular glands

A

submandibular ganglion

62
Q

what n do the PAN postganglionic fibers run with to submandibular and sublingual glands

A

lingual branch of V3

63
Q

what is the action of PANs to submandibular and sublingual glands

A

secretomotor, stimulates salivation

Neuro III (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions