random neuro questions

Question 1

cerebral aqueduct is in which part of the brain?

Answer 1

mesencephalon

Question 2

the romberg sign (stand with closed eyes) tests which pathway?

Answer 2

dorsal column

Question 3

lesions of cerebellum lead to deficits on the

Answer 3

same side

Question 4

lesions of cerebrum lead to deficits on the

Answer 4

opposite side

Question 5

function of CN 3, 4, 6

Answer 5

extraoccular eye movements

Question 6

function of CN 5

Answer 6

sensory and motor innervation fo the face a muscles of mastication`

Question 7

function of CN 7

Answer 7

muscles of facial expression

Question 8

function of CN 8v

Answer 8

otolithic organs, SSC, hair celss

Question 9

function of CN 8c

Answer 9

cochlear nuclei, central auditory pathway (MGN & Herschl’s gyrus)

Question 10

function of CN 9

Answer 10

baroreflex circuity (blood pressure), swallowing

Question 11

function of CN 10

Answer 11

visceral function

Question 12

mesencephalic nucleus

Answer 12

sens nuc 5- jaw jerk reflex

Question 13

spinal nucleus

Answer 13

sensory nuc 5- pain and temp for head (7,9, 10 for ear pinna); like STT

Question 14

main sensory

Answer 14

sensory nuc 5- similar to dorsal column, relays position, vibration, 2 pt discrimination for head

Question 15

3 parts of sensory trigeminal

Answer 15

mesencephalic, main sensory, spinal

Question 16

broca’s is in which region

Answer 16

inferior frontal

Question 17

cuneatus cutoff in spinal cord

Answer 17

T6 (between nipples- T4, and umbilicus- T10)

Question 18

disorders of ascending pathways (DCP, STT, SCT, CST)

Answer 18

DCP- positive rhomberg- tapes dorsalis
STT- meduallary stroke- wallenberg
dSCT- muscular weakness/abnormal gait- freidrich’s ataxia
CST- spastic vs flaccid paralysis, ALS

Question 19

Romberg sign

Answer 19

stand with feet together, eyes closed

positive for sensory ataxia, not cerebellar ataxia

Question 20

superior cerebellar peduncles desscuate in the

Answer 20

caudal midbrain

Question 21

order of stuff in cochlea

Answer 21

scala vestibuli on top of reisner’s membrane on top of cochlear duct split by tectorial membrane on top of basilar membrane on top of scala tympani

Question 22

neither eye responds to light on damaged side represents damage of which CN?

Answer 22

optic nerve (2)

Question 23

a damaged pupil doesn’t respond to light on either side represents damage of which CN?

Answer 23

occulomotor (3)

Question 24

accommodation reflex

Answer 24

• vergence- medial recti
• thickening of lens- ciliary mucsle contraction
• constriction of the pupils

Question 25

what cortical layer is greatly expanded in the primary visual cortex compared to all others?

Answer 25

4 (input layer)