05b: More CNs

Question 1

Oculomotor nucleus located in:

Answer 1

Upper midbrain

Question 2

Trochlear nucleus located in:

Answer 2

Lower midbrain

Question 3

Abducens nucleus located in:

Answer 3

Pons

Question 4

Hypoglossal nucleus located in:

Answer 4

Medulla

Question 5

Trigeminal nucleus located in:

Answer 5

Pons

Question 6

Facial nucleus located in:

Answer 6

Pons

Question 7

(X) nucleus, which carries motor fibers via CN 9 and 10, is located in:

Answer 7

X = nucleus ambiguous

Medulla

Question 8

(X) nucleus, which carries motor fibers via CN 11, is located in:

Answer 8

X = cervical accessory

Upper SC

Question 9

Parasympathetic nerve fibers traveling in CN 3 originate in (X) nucleus in brainstem.

Answer 9

X = Edinger-Westphal

Question 10

Parasympathetic nerve fibers traveling in CN 7 originate in (X) nucleus in brainstem.

Answer 10

X = superior salivary

Question 11

Parasympathetic nerve fibers traveling in CN 9 originate in (X) nucleus in brainstem.

Answer 11

X = inferior salivary

Question 12

Parasympathetic nerve fibers traveling in CN 10 originate in (X) nucleus in brainstem.

Answer 12

X = dorsal motor nucleus of X

Question 13

Patient has hoarseness in voice and left-deviation of uvula on phonation. Which nerve damaged?

Answer 13

Right vagus

Question 14

Carotid artery bifurcation occurs at level of which landmark in pharynx/larynx?

Answer 14

Superior border of thyroid cartilage

Question 15

The afferent limb of gag reflex is a mediated by (X) branch of (Y) nerve. (Z) nerve mediates efferent limb of this reflex.

Answer 15

X = pharyngeal
Y = glossopharyngeal
Z = vagus

Question 16

The pupillary light reflex involves (X) nerve as the afferent limb and (Y) nerve as the efferent limb

Answer 16

X = optic
Y = oculomotor

Question 17

Ipsilateral slowness of the pupillary response to light is the first sign of (compression/lesion) in:

Answer 17

Compression of the oculomotor nerve