Cranial Nerves

Question 1

Cranial Nerve I

Answer 1

Olfactory
Purely sensory
Carries impulses for sense of smell

Question 2

Cranial Nerve II

Answer 2

Optic
Purely sensory
Carries impulses for vision

Question 3

Cranial Nerve III

Answer 3

Oculomotor
Supplies motor fibers to 4/6 muscles that direct the eye
Basically controls all eye movement that of the eye ball and thing like the pupil

Question 4

Cranial IV

Answer 4

Trochlear
Supplies motor fibers for one external eye muscle

Question 5

Cranial Nerve V

Answer 5

Trigeminal
Conducts sensory impulses from the skin of the face and mucosa of the nose and mouth
Contains motor fibers that activate chewing muscles

Question 6

Cranial Nerve VI

Answer 6

Abducens
Supplies motor fibers to the lateral recuts muscle
Rolls the eyes

Question 7

Cranial Nerve VII

Answer 7

Facial
Activates muscles of facial expression and the lacrimal and salivary glands
Carries sensory impulses from the taste buds of anterior tongue

Question 8

Cranial Nerve VIII

Answer 8

Vestibulocochlear
Purely sensory
Vestibular branch transmits impulses for the sense of balance
Cochlear branch transmits impulses for the sense of hearing

Question 9

Cranial Nerve IX

Answer 9

Glossopharyngeal
Supplies motor fibers to the pharynx
Promotes swallowing and saliva production
Carries sensory impulses from taste buds and from pressure receptors of the carotid artery

Question 10

Cranial Nerve X

Answer 10

Vagus
Fibers carry sensory impulses and motor impulses to the pharynx and larynx and the abdominal and thoracic viscera
Most motor fibers are parasympathetic fibers that promote digestive activity and help regulate heart activity

Question 11

Cranial Nerve XI

Answer 11

Accessory
Mostly motor fibers that activate the sternocleidomastoid and trapezius muscles

Question 12

Cranial Nerve XII

Answer 12

Hypoglossal
Motor fibers control tongue movements
Sensory fibers carry impulses from the tongue