12 cranial nerves and functions

Question 1

purely sensory; carries impulses for the sense of smell

Answer 1

1. Olfactory

Question 2

Purely Sensory; carries impulses for vision

Answer 2

2. Optic

Question 3

supplies motor fibers to four of the six muscles that direct the eyeball; to the eyelid; and to the internal eye muscles controlling lens shape and pupil size

Answer 3

3. oculomotor

Question 4

supplies motor fibers for external eye muscle

Answer 4

4. trochlear

Question 5

conducts sensory impulses from the skin of the face and mucosa of the nose and mouth; also contains motor fibers that activates the chewing muscles

Answer 5

5. trigeminal

Question 6

supplies motor fibers to the lateral rectus muscle, which rolls the eye laterally

Answer 6

6. abducens

Question 7

activates the muscles of facial expression and the lacrimal and salivary glands; carries sensory impulses from the taste buds of anterior tongue

Answer 7

7. facial

Question 8

purely sensory; vestibular branch transmits impulses for the sense of balance, and cochlear branch transmits impulses for the sense of hearing

Answer 8

8. vestibuloochlear

Question 9

supplies motor fibers to the pharynx that promote swallowing and saliva production; carries sensory impulses from taste buds of the posterior tongue and from pressure receptors of the carotid artery

Answer 9

9. Glossopharyngeal

Question 10

fibers carry sensory impulses from and motor impulses to the pharynx, larynx and the abdominal and thoracic viscera; most motor fibers are parasympathetic fibers that promote digestive activity an help regulate heart activity

Answer 10

10. vagus

Question 11

mostly motor fibers that activate the sternocleidomastoid and trapezius muscles

Answer 11

11. accessory

Question 12

motor fibers control tongue movements; sensory fibers carry impulses from the tongue

Answer 12

12. hypoglossal