brainstem and cranial nerves

Question 1

CN I function

Answer 1

detect smell

trigger stimulation in response to smell stimuli

Question 2

CN I origin

Answer 2

Striae, Tract, Bulb: base of forebrain

Proper: caudal surface of olfactory bulb

Question 3

CN II function

Answer 3

vision (optic tract) and pupillary light reflex

Question 4

CN II origin

Answer 4

retina

Question 5

CN IV function

Answer 5

innervates SO muscle to primarily intort the eye

Question 6

CN IV origin

Answer 6

trochlear nucleus in ventral part of midbrain periaqueductal at the level of the inferior colliculus

Question 7

CN IV crossing point

Answer 7

at the midline after dorsally passing around the periaqueductal grey

Question 8

CN V function

Answer 8

somatic division and visceral division

Question 9

CN IX function

Answer 9

somatic efferent

Question 10

CN X function

Answer 10

general visceral efferent, special visceral efferent

Question 11

CN XI function

Answer 11

internal branch - innervates swallowing muscles

external branch - controls muscles associated with pectoral girdle

Question 12

CN XII function

Answer 12

controls ipsilateral side of tongue movements

Question 13

anosmia

Answer 13

loss of smell and flavor of foods - trauma, invasion of tumor of meninges

Question 14

CN XI origin

Answer 14

medulla oblongata

Question 15

CN X origin

Answer 15

lateral to olive, adjacent to glossopharyngeal nerve