Cranial Nerve Functions

Question 1

CN I: Olfactory

Answer 1

Sensory
Sense of smell

Question 2

CN II: Optic

Answer 2

Sensory
Sense of vision

Question 3

CN III: Oculomotor

Answer 3

Motor
Movement of the eye, raises upper eyelid, pupil constriction, lens accommodation

Question 4

CN IV: Trochlear

Answer 4

Motor
Movement of the eye, abducts and depresses eye, internal rotation of eye

Question 5

CN V: Trigeminal

Answer 5

Sensory and motor

Question 6

Trigeminal Branch VI: Opthalmic

Answer 6

Sensory to upper eyelid, nose, forehead, and scalp

Question 7

Trigeminal Branch V2: Maxillary

Answer 7

Sensory to maxilla, nasal cavity, palate, and skin of cheeks

Question 8

Trigeminal Branch V3: Mandibular Branch

Answer 8

Chewing muscles, sensory to lower lip, lower teeth, chin, and temportal region of scalp, anterior 2/3 of tongue

Question 9

CN VI: Abducens

Answer 9

Motor
Abduction of the eye

Question 10

CN VII: Facial

Answer 10

Sensory and motor
Innervates muscles in charge of facial expressions

Question 11

5 Facial Nerve Branches

Answer 11

Temporal
Zygomatic
Buccal
Mandibular
Cervical

Question 12

CN VIII: Vestibulocochlear

Answer 12

Sensory
Vestibular and cochlear branches

Question 13

CN IX: Glossopharyngeal

Answer 13

Sensory and motor
Elevates pharynx during swallowing, parasympathetic motor fibers to salivary glands, taste from posterior 1/3 of the tongue

Question 14

CN X: Vagus

Answer 14

Sensory and motor
Somatic motor innervation to muscles of pharynx and larynx, parasympathetic fibers to heart, lungs, and abdominal organs

Question 15

CN XI: Accessory

Answer 15

Motor
Innervates trapezius and SCM muscles

Question 16

CN XII: Hypoglossal

Answer 16

Motor
Muscles of the tongue