CN I

Question 1

GSA

Answer 1

general somatic afferent

touch, pain, pressurem temp, portion sense picked up by somatic structures

Question 2

GVA

Answer 2

general visceral afferent

carry pain/pressure from visceral structures

Question 3

GVE

Answer 3

autonomics

Question 4

GSE

Answer 4

skeletal motor

originate from somites, innervate skeletal muscle

Question 5

SVA

Answer 5

special visceral afferent

olfaction and taste

Question 6

SSA

Answer 6

special somatic afferent

vision, hearing, balance

Question 7

SVE

Answer 7

special visceral efferent

skeletal motor fibers that innervate skeletal muscles derived from pharyngeal arches

Question 8

what fibers does CN I carry

Answer 8

SVA

Question 9

what does the olfactory pathway consist of

Answer 9

sequence of olfactor receptor cells and second order neurons

Question 10

where does the olfactory system project to

Answer 10

directly to olfactory cortex and limbic cortex, compeltely skips the thalamus

Question 11

what is CN I formed by

Answer 11

all axons of 1st order neurons that pass through the cribiriform plate of ethmoid bone bilaterally

Question 12

anosmia

Answer 12

complete loss of olfaction

Question 13

hyposmia

Answer 13

partial loss of olfaction

Question 14

parosmia

Answer 14

distorted perception of sense of smell

Question 15

phantosmia

Answer 15

smelling thigns that aren’t there

Question 16

what are the receptors of the visual system

Answer 16

rods and cones

Question 17

what are the first order neurons of the visual pathway system

Answer 17

bipolar neurons

Question 18

what are the second order neurons of the visual pathway

Answer 18

ganglion cells

Question 19

what is the area lamina

Answer 19

located on posterior eyeball, ganglion cells gather and pass through to form the optic neurve

Question 20

what is the optic nerve myelinated by

Answer 20

olgidendrocytes

Question 21

lateral geniculate nucleus

Answer 21

contains cell bodies of 3rd order neurons which give rise to geniculocalcarine tract

Question 22

superior colliculus

Answer 22

visual reflex center

Question 23

what happens if you completely transcet an eyeball

Answer 23

total blindness in that eye

Question 24

what happens if you have lesion of optic chaism horizontally affecting just one half

Answer 24

ipsilateral nasal hemianoopia

Question 25

what happens if you ahve a bilateral lesion of optic chiasm

Answer 25

binasal heteronymous hemianopia

Question 26

what can cause bilateral lesion of optic chiasm

Answer 26

internal carotid aneurysm

Question 27

what happens if you have lesion at center of optic chiasm

Answer 27

bitemporal heteronymous hemianopia

Question 28

what happens if you have lesion damaging ganglion cell axons of left optic tract

Answer 28

right homonymous hemianopia

Question 29

what happens if you have lesion of myer's loop

Answer 29

right upper homonymous quadrantanopia (pie in sky)

Question 30

what happens if you have lesion of superior division of geniculocalcarine tract

Answer 30

right lower homonymous quadrantanopia (pie on floor)

Question 31

in general what results from lesion beofre/at optic chiasm

Answer 31

heteronymous

Question 32

in general what happens from lesion after optic chiasm

Answer 32

homonomous

Question 33

what can occlusion of PCA cause

Answer 33

macular sparing

Question 34

where is nucleus ambigous located

Answer 34

medulla

Question 35

what can lesion of CN XI high in the neck cause

Answer 35

SCM turns head upward to contralateral side as well as approximates ear to ipsilateral shoulder

Question 36

what can lesion of CN XI lower cause

Answer 36

mild shoulder droop and winged scap

Question 37

where is hypoglossal nucleus located

Answer 37

medulla

Question 38

what does CN XII innervate

Answer 38

``` all intrinsic muscles that change shape of tongue most extrincic (except geniohyoid) ```

Question 39

what happens with LMN lesion of XII

Answer 39

tongue deviates to side of lesion

Question 40

where are cell bodies on primary neurons in CN I

Answer 40

epithelium

Question 41

primary neurons in CN I can ____

Answer 41

regenerate

Question 42

what does CN I terminate in

Answer 42

olfactory bulb

Question 43

what do seoncdary nerurons of olfactory nerve form

Answer 43

olfactory tract

Question 44

what does olfactory tract divid into

Answer 44

medial and lateral olfactory stria

Question 45

lateral olfactory stria

Answer 45

principle central projection of olfacotry system

Question 46

what does lateral olfactory stria terminate in

Answer 46

olfactory cortex and amygdala

Question 47

what does the nucleus ambiguus give rise to

Answer 47

aberrant vagal fibers

Question 48

what spinal cord levels give rise to axons that form spinal accessory nerve

Answer 48

C1-C5(6)