Cranial Nerves

Question 1

CN I

Answer 1

Olfactory

Function: Sense of smell

Associated Structures: Olfactory bulbs, olfactory tracts

Sensory

Question 2

CN II

Answer 2

Optic Neve

Function: Visual impulses to brain

Associated Structures: optic chiasm, optic tracts

Sensory

Question 3

CN III

Answer 3

Oculomotor Nerve

Function: Movement of eye and upper eye lid, pupil constriction; proprioception

1 of 3: innervates extrinsic eye muscles
1 of 4: Autonomic motor axons

Motor (Both)

Question 4

CN IV

Answer 4

Trochlear Nerve

Function: Eye movement; proprioception

1 of 3: innervates extrinsic eye muscles
Arise posterior aspect of brain
Smallest

Motor (Both)

Question 5

CN V

Answer 5

Trigeminal Nerve

Function: lower face sensation, mastication; proprioception

Largest
Emerges from pons
Isolated

Two roots: large sensory root and sensory root

Both

Question 6

CN VI

Answer 6

Abducens Nerve

Functions: Eye movement; proprioception

1 of 3: innervates extrinsic eye muscles

Motor (Both)

Question 7

CN VII

Answer 7

Facial Nerve

Functions: Facial expression, taste, salivation

Comprises two roots: primary root and
1 of 4: Autonomic motor axons