2b. Cranial Nerve Modalities and Functions (only)

Question 1

6 types of CN modalities

Answer 1

• somatic motor
• branchial motor
• visceral motor
• visceral sensory
• general sensory
• special sensory

Question 2

nuclei and associated nerves of somatic motor modality

Answer 2

• oculomotor n. (CN III)
• trochlear n. (CN IV)
• abducens n. (VI)
• hypoglossal n. (XII)

Question 3

nuclei and associated nerves of branchial motor modality

Answer 3

• masticator (CN V)
• facial n. (CN VII)
• ambiguus (CN IX, X)
• accessory n. (CN XI)

Question 4

nuclei and associated nerves of visceral motor (parasympathetic) modality

Answer 4

• Edinger-Westphal (CN III)
• superior salivatory (CN VII)
• inferior salivatory (IX)
• dorsal vagus (X)

Question 5

nuclei and associated nerves of the visceral sensory modality

Answer 5

• solitarius (CN IX, X)

Question 6

nuclei and associated nerves of the general sensory modality

Answer 6

• trigeminal n. (CN V, VII, IX, X)

Question 7

nuclei and associated nerves of the special sensory modality

Answer 7

• mitral cells of the olfactory bulb (CN I)
• ganglion cells of the retina (CN II)
• gustatory (CN VII, IX)
• vestibular (CN VIII)
• cochlear (CN VIII)

Question 8

function of CN III

Answer 8

extraocular eye muscles (except superior oblique and lateral rectus)

Question 9

function of CN IV

Answer 9

superior oblique m.

Question 10

function of CN VI

Answer 10

lateral rectus

Question 11

function of CN XII

Answer 11

intrinsic & extrinsic tongue muscles (except palatoglossus)

Question 12

function of CN V

Answer 12

muscles of mastication

Question 13

function of CN VII

Answer 13

muscles of facial expression

Question 14

function of CN IX/X (from ambiguus)

Answer 14

muscles of pharynx and larynx

Question 15

function of CN XI

Answer 15

trapezius and sternomastoid

Question 16

function of CN III

Answer 16

ciliary muscle and constrictor pupillae

Question 17

function of CN VII

Answer 17

all galnds of head (except integumentary and parotid)

Question 18

function of CN X

Answer 18

all thoracic viscera and abdominal viscera to the splenic flexure

Question 19

function of IX/X (from solitarius)

Answer 19

visceral afferent info necessary for visceral reflexes and nausea (not pain)

Question 20

function of CN V, VII, IX, X (from trigeminal n.)

Answer 20

• pain
• temperature
• touch
• proprioception from head and neck
• sinuses
• meninges

Question 21

function of CN I (mitral cells of olfactory bulb)

Answer 21

smell

Question 22

function of CN II (ganglion cells of retina)

Answer 22

vision

Question 23

function of CN VII, IX (gustatory)

Answer 23

taste

Question 24

function of CN VIII (vestibular)

Answer 24

balance

Question 25

function of CN VIII (cochlear)

Answer 25

hearing