Brainscape's Knowledge GenomeTM

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


See full index

Structures: Part Deux > LEC54: Cranial Nerves II > Flashcards

LEC54: Cranial Nerves II Flashcards

1
Q

function of SVE, special visceral efferent, fibers?

A

fibers innervating muscles derived from a branchial arch

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

function of SVA, special visceral afferent, fibers?

A

fibers that deal w/ GUT-RELATED SENSE of head/neck:

1) taste
2) smell

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

function of SSA, special somatic afferent, fibers?

A

NON-GUT related to special SENSE fibers of head/neck:

1) vision
2) balance
3) hearing

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

what kinds of nerve fibers present in head/neck?

A

both special and general just b/c in head/neck, doesn’t mean it’s ONLY special fibers- also have general

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

which CN are special sensory nerves?

A

1) CNI: olfactory
2) CNII: optic
3) CNVII: vestibulocochlear

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

what is unique about CNI, CNII?

A

CNI, olfactory & CNII, optic ARE NOT REALLY NERVES;

nerve must come from a nucleus, go to effector organ, or have sensory ganglia somewhere;

these are actually BRAIN TRACTS

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

fiber type in CNI, olfactory n? fxn?

A

SVA ONLY

helps w/ flavor detection by bringing in air

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

fiber type of CNII, optic n? fxn?

A

SSA ONLY

nerve of vision

transmits info from retina > brain

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

function and significance of central artery of the retina?

A

an END ARTERY w/ NO collaterals

when lose this, lose vision

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

fiber type of CNVII, vestibulocochlear n? fxn?

A

SSA only

balance!

vestibular and auditory systems

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

which CN are myotomal?

A

1) CNIII, oculomotor
2) CNIV, trochlear
3) CNVI, abducens
4) CNXII, hypoglossal

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

derivation of myotomal CNs?

A

somites

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

what fiber type for all myotomal CN?

A

GSE

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

fiber types/fxn of CNIII, occulomotor?

A

GSE & GVE-autonomics

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

what do autonomics of CNIII do?

A

preganglionic parasympathetics, do pupillary constriction

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

location of CNVI, abducens? susceptibility therein?

A

lies on clivus bone

v susceptible to pontine tumors

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

which CN is big motor nerve of tongue?

A

CNXII, hypoglossal

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

which CN are branchioneric?

A

1) CNV: trigeminal
2) CNVII: facial
3) CNIX: glossopharyngeal
4) CNX: vagus
5) CNXI: spinal accessory n
* branchioneric = derived from branchial arches, so have to do w/ neural crest cells*

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

muscle type related to branchioneric nerves?

A

skeletal

20
Q

what is most widespread nerve in the head?

A

CNV, trigeminal

21
Q

fiber types for CNV, trigeminal

A

SVE, GSA

(mainly GSA)

22
Q

divisions of trigeminal n?

A

1) opthalmic
2) maxillary
3) mandibular

23
Q

what controls ability to stick out tongue?

A

CNV, trigeminal’s GSA fibers

24
Q

what does CNV, trigeminal, innervate?

A

1) muscles of mastication
2) muscles of tongue
3) corneal reflex
4) facial sensory innervation
5) mucosa of inernal paranasal sinuses

25
Q

which divisions of CNV, trigeminal n innervate which parts of face?

A
26
Q

what is trigeminal neuralgia?

A

aka tic douboureaux

usu limited to 1 division of trigeminal on 1 side

extremely painful

27
Q

fiber types for CNVII, facial n

A

1) SVE
2) GSA - swatch near auricle
3) SVA - taste!
4) GVE

28
Q

what is chorda tympani?

A

nerve that originates in taste buds in front of tongue; runs through middle ear; carries taste messages to brain

joins CNVII (facial n) inside facial canal

therefore facial n, CNVII, carries taste

29
Q

fiber types of CN IX, glossopharyngeal n?

A

1) SVE
2) GSA
3) SVA
4) GVE
5) **GVA - **coming back from pharynx

endodermal

*5 fiber types here - greater # found in any CN!*

30
Q

fiber types of CN X, vagus n

A

1) SVE
2) GSA
3) SVA
4) GVE
5) GVA
* *5 fiber types, like CN IX!* *

31
Q

what is cricothyroid m? what supplies it?

A

muscle of larynx

CNX, vagus n supplies it

32
Q

fiber types for CN XI, spinal accessory n? structure of CN XI?

A

SVE

1) cranial root
2) spinal root

33
Q

distribution of cranial root of CN XI, spinal accessory n? fiber type?

A

1) goes into CNX, vagus
2) distributed in recurrent laryngeal n

SVE fibers

34
Q

distribution of spinal root of CN XI, spinal accessory n?

fiber type?

what does it innervate?

A

1) goes into vagus, CN X
2) comes out as own nerve, spinal accessory n

SVE fibers

innervates trapezius, sternocleidomastoid mm

35
Q

what do CN IX and CN X share? what is their relationship?

A

4 brain stem nuclei

are very tight nerves

36
Q

is there a correlation btwn nerve deafness and nerve balance features? why/why not?

A

no

b/c vestibular and cochlear nerves come from diff pts on brain stem

37
Q

major motor innervator of tongue?

A

CN XII, hypoglossal n

38
Q

where does thyroid come from?

A

foramen cecum

39
Q

what is secondary motor innervator of the tongue?

A

palatoglossas n, from CNX, XI

40
Q

what is anterior 2/3 of tongue covered in?

A

ectoderm

41
Q

what embryonic tissue type is posterior 1/3 of tongue derived from?

A

endoderm

42
Q

what provides general sensation to anterior 2/3 of tongue?

A

GSA from CN V

43
Q

what provides taste for anterior 2/3 of tongue?

A

SVA from CN VII

chorda tympany

44
Q

what fiber type & from which nerve provides sensory innervation to posterior 1/3 of tongue?

A

GVA by CN IX

GVA not GSA since endodermally derived

45
Q

what fiber type & from which nerve carry taste for posterior 1/3 of tongue?

A

SVA, CN IX, glossopharyngeal

46
Q

which CN carries taste sensation for epiglottis?

A

CN X

47
Q

what is main sensory nerve for gag reflex?

A

CN IX, glossopharyngeal n

Structures: Part Deux (36 decks)

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