Brainscape's Knowledge GenomeTM

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


See full index

Anatomy > CN V and VII > Flashcards

CN V and VII Flashcards

1
Q

what are the 3 divisions of CN V

A

V1 - opthalmic (sensory)
V2 - maxillary (sensory)
V3 - mandibular (sensory and motor)

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

what muscles does CN V3 provide motor innervation for ?

A

muscles of mastication and tensor tympani and tensor palatini (MOM and twins)

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

what is the main general sensory crainal nerve of the head

A

CN V

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

at what level of the brainstem would you be able to find the trigeminal main sensory nucleus, and trigeminal motor nucleus ?

A

midpons

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

what are the 2 ascending projections of CN V

A

trigeminal spinal nucleus, main trigeminal sensory nucleus

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

what is the path of the ascending trigeminal spinal nucleus ?

A

contralateral projection to VPM of thalamus, synapses then to postcentral gyrus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

the postcentral gyrus is found on what lobe ?

A

parietal lobe area 3,1,2

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

the main trigeminal sensory nucleus is responsible for sensing what ?

A

discriminative touch, vibration, and proprioception of jaw

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

what major tract or pathway is the trigeminal main sensory nucleus a homologue of ?

A

posterior collumn/medial lemniscus pathway

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

there are 2 individual ascending pathways that make up the trigeminal main sensory nucleus, what are there differences

A
  • one CROSSES midline then joins medial lemniscus pathway to the VPL then to postcentral gyrus
  • one stays UNCROSSED and ipsilaterally ascends to VPM
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

the trigeminal spinal nucleus is responsible for sensing what ?

A

pain, temperature, crude touch

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

what are the 3 divisions of the trigeminal spinal nucleus

A 
pars oralis (oral nucleus)
pars interpolaris (interpolar nucleus)
pars caudalis (caudal nucleus)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what division of the trigeminal spinal nucleus is responsible for sensing pain and temperature and crude touch

A

pars caudalis

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

what is the pars interpolaris division of the trigeminal spinal nucleus responsible for sensing ?

A

trigemino-autonomic reflexes

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

what nucleus of CN V would be found in a cross section of the midbrian

A

trigeminal mesencephalic nucleus

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

the when second order neurons of the trigeminal spinal nucleus cross the midline, what significant path/tract do they join ?

A

Anterolateral pathway/spinothalamic tract

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

where does the anterolateral/spinothalamic tract terminate ?

A

VPM of thalamus, synapses and ascends to postcentral gyrus

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

explain the “onion peel” representation, and what nuclei/origin of the trigeminal nerve is it referring to ?

A

Referring to pars caudalis of trigeminal spinal nucleus
-type of somatotopic organization (inverted face representation) where V1 division ends most vetral in posterior horn and V3 ends most dorsal

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

what would cause the largest amount of sensory loss, an injury to the most dorsal aspect of the trigeminal spinal tract or most ventral ?

A

injury to the dorsal aspect would cause the most sensory loss

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

75 percent of sensory fibers in the tooth pulp sense what ? the remaining 25 % sense ?

A

pain, temperature

-touch and pressure

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

what is trigeminal neuroglia

A

brief episodes of excruciating pain in the dist. of one or more division of the trigeminal nerve

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

what division of the trigeminal nerve is usually associated with trigeminal neuralgia

A

V3

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

what are the characteristics of trigeminal neuralgia

A
  • no sensory trouble b/w attacks
  • tactile stimulus can trigger attacks
  • due to compression of trigeminal nerve and vasculature
24
Q

what do they do today to treat trigeminal neuralgia

A

microvascular decompression to relieve pressure on nerve and vessels around it

25
Q

what trigeminal nerve nuclei contains unipolar neurons

A

trigeminal mesencephalic nucleus

26
Q

the trigeminal mesencephalic nucleus is responsible for sensing what ?

A

proprioception of MOM, mechanorececeptors of mouth and gingiva

27
Q

what peripheral nucleus of the trigeminal nerve is known as the masticatory generator

A

supra-trigeminal nucleus

28
Q

what nuclei of the trigeminal nerve is responsible for controlling the occlusal vertical dimension ?

A

trigeminal mesencephalic nucleus

29
Q

at the CNS origin of the trigeminal nerve, which nuclei at the midpons level would be more lateral, main sensory nucleus or motor nucleus

A

main sensory nucleus = lateral

30
Q

the trigeminal mesencephalic nuclues follows/joins what significant pathway/tract

A

Posteriolateral collumn/medial lemniscus pathways

31
Q

which nuclei of the trigeminal nerve have axons that are heavily myelinated

A

main sensory nucleus and mesencephalic nucleus

32
Q

which nuclei of the trigeminal nerve has axons that are lighty to no myelination

A

trigeminal spinal nucleus (pain and temperature)

33
Q

what nuclei is involved with stretch reflexes from V2 and V3

A

trigeminal mesencephalic nucleus

34
Q

what is the function of the trigeminal motor nucleus and what division of the trigeminal nerve does it correspond to

A

V3-responsible for innervation of MOM and tensor twins, and jaw CLOSURE

35
Q

what is the afferent limb of the jaw-jerk reflex, what is the efferent limb ?

A

afferent is mesencephalic nucleus and efferent is motor nucleus

36
Q

the jaw-jerk reflex is what type of reflex ?

A

monosynaptic

37
Q

what is the function of the stapedius m and what is it innervated by

A

modulate sound volume, CN VII

38
Q

what innervation does CN VII have on taste

A

innervates anterior 2/3 of tounge, CN IX does posterior 1/3

39
Q

the geniculate ganglion is involved with motor or sensory nuclei for CN VII

40
Q

what action does CN VII have on MOM

A

closes eyes and closes lips

41
Q

CN VII visceral motor fibers can send motor efferents to what glands via what ganglia ?

A

salivatory, lacrimal, submandibular, sublingual, palatine glands via submandibular ganglion, pterygopalatine ganglion, and superior salivatory nucleus

42
Q

the somatic sensory portion of CN VII recieves impulses from where ? and would synapse where ?

A

receive from outer ear and synapse on geniculate ganglion and trigeminal spinal nucleus

43
Q

the visceral sensory portion of CN VII receives impulses from where and synapses where ?

A

from anterior 2/3 of tongue and synapses at geniculate ganglion and solitory tract nucleus

44
Q

the facial motor nucleus is a homologue with what other major pathway

A

corticobulbar pathway

45
Q

what is the difference b/w motor innervation to the upper and lower face

A
  • upper face innervated bilaterally via CN VII

- lower face innervated contralaterally via CN VII

46
Q

a lesion in the left corticobulbar pathway would result in damage where ?

A

weakness in lower right facial muscles

47
Q

what is Bell’s Palsy

A

unilateral facial paralysis due to shitty CN VII

48
Q

what is the afferent and efferent limbs of the corneal blink reflex

A

afferent is V1

effernt is VII

49
Q

what is the afferent and efferent limbs of jaw opening and jaw closing reflexes

A

input V

output V3

50
Q

what is the afferent and efferent limbs of the blink to light reflex

A

afferent is CN II

efferent is motor CN VII

51
Q

what is the afferent and efferent limbs of the blink to noise reflex

A

afferent is cochlear nucleus

efferent is motor CN VII

52
Q

what is the afferent and effernt limbs of the sound attenuation reflex

A

afferent is cochlear nucleus

efferent is motor CN VII

53
Q

what effect does CN X have on taste

A

provides innervation to epiglottis

54
Q

all sensory input from the taste buds goes to what nuclei ?

A

solitary tract nucleus

55
Q

what is the principal visceral sensory nucleus of the brainstem

A

nucleus of the solitary tract

Anatomy (35 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions