Cranial Nerves

Question 1

CN I: axon categories and function

Answer 1

Sp - olfaction

Question 2

CN II: axon categories and functions

Answer 2

Sp - vision

Question 3

CN III: axon categories and functions

Answer 3

Sm - eye muscles

A - pupil diameter

Question 4

CN IV: axon categories and functions

Answer 4

Sm - superior oblique (eye muscle)

Question 5

CN V: axon categories and functions

Answer 5

Ss - sensation of face, scalp, cornea, nasal & oral cavity, anterior tongue, dura; proprioception
B - muscles of mastication, tensor tympani

Question 6

CN VI: axon categories and functions

Answer 6

Sm - lateral rectus (eye muscle)

Question 7

CN VII: axon categories and functions

Answer 7

B - muscles of facial expression, strapedius
A - salivary and lacrimal glands
Vi - taste (anterior 2/3 of tongue)
Ss - external ear skin

Question 8

CN VIII: axon categories and functions

Answer 8

Sp - balance and hearing

Question 9

CN IX: axon categories and functions

Answer 9

B - swallowing
A - parotid gland
Ss - general sensation of posterior tongue and back of ear
Vi - taste (posterior 1/3 of tongue), gag reflex, carotid body/sinus

Question 10

CN X: axon categories and functions

Answer 10

B - muscles for speech & swallowing
A - parasympathetic control of thoracic and abdominal viscera
Ss - general sensation if external ear, pharynx, larynx, esophagus
Vi - sensation from viscera, carotid bodies, aortic batoceptor

Question 11

CN XI: axon categories and functions

Answer 11

B - sternocleidomastoid & trapezius

Question 12

CN XII: axon categories and functions

Answer 12

Sm - muscles of tongue

Question 13

Which cranial nerves include B, A, Vi & Ss components?

Answer 13

VII, IX & X

Question 14

Which cranial nerves are purely sensory?

Answer 14

I, II & VIII

Question 15

Which cranial nerves are purely motor?

Answer 15

III, IV, VI, XI & XII

Question 16

Which cranial nerves control the eye muscles?

Answer 16

III, IV & VI