Cranial Nerves (10/3) w/Hutcheson

Question 1

CN I

Answer 1

Olfactory Nerve

• Only sensory
• Part of the telencephalon, NOT a true cranial nerve.

*Optic Canal

Question 2

CN II

Answer 2

Optic Nerve

• Only sensory
• Part of the diencephalon, NOT a true cranial nerve.

*Optic Canal

Question 3

CN III

Answer 3

Oculomotor Nerve

*Motor

Innervates (somatic motor):

• superior rectus
• inferior rectus
• medial rectus
• inferior oblique

-levator palpebrae superioris (upper eyelid)

(Visceral motor control):

• pupillary sphincter
• ciliary muscle

*Superior orbital fissue

Question 4

CN IV

Answer 4

Trochlear Nerve

*Motor

Somatic motor: superior oblique

*superior orbital fissue

• *Only CN with contralateral symptoms in nuclear lesion.
• *Only CN to emerge from dorsal suface.

Question 5

CN VI

Answer 5

Abducens Nerve

*Motor

Somatic motor: lateral rectus

Question 6

CN V

Answer 6

Trigeminal Nerve

*Both