Cranial nerves

Question 1

V3 exits?

Answer 1

foramen ovale

Question 2

Jaw jerk
sensory in what nucleus?
motor?

Answer 2

mesencephalic > motor nucleus of V

Question 3

Fibers to the superior salivatory nucleus?

Answer 3

nervus intermedius

Question 4

Facial nerve exits the brainstem where?

Answer 4

Prontomedullary junction

Question 5

motor component of CN IX

Answer 5

nucleus ambiguus

Question 6

mediates the sensory component of the gag reflex

Answer 6

CNIX

Question 7

CN X exits between which 2 structures?

Answer 7

inferior olive and inferior cerebellar peduncle

Question 8

CN X exits the calvarium via?

Answer 8

jugular foramen

Question 9

LMN lesion of XI causes?

Answer 9

Weakness of ipsilateral trapezius and SCM (which rotates head away)

Question 10

UMN of XI causes?

Answer 10

Contralateral trapezius weakness and ipslateral SCM (no descssation) so you cannot turn head away from the lesion in brain/ toward weak shoulder (this allows the head to turn toward the active shoulder)

Question 11

XII exits the brainstem where?

Answer 11

between the inferior olives and the pyramids (junction between the medulla and the brainstem

Question 12

Nucleus solitarius
rostral?
Caudal?

Answer 12

rostral - called the gustatory nucleus & is concerned w/ taste (VII, IX, X)
caudal - cardiorespiratory inputs (also from VII, IX, X)

Question 13

Input to the ….. from the optic nerve is important for the startle reflex

Answer 13

superior colliculus

Question 14

pathway of the trigeminal tract?

Answer 14

chief sensory nucleus of V to the ventroposteromedial nucleus (VPM) of the thalamus

Question 15

Auditory receptors are located in the ..

Answer 15

organ of Corti of the cochlea

Question 16

Hair cells in the semicircular canals, saccule, vestibule ->

Answer 16

vestibular ganglion (Scarpa’s ganglion)

Question 17

GSA to the back of the head?

Answer 17

C2