Cranial Nerves

Question 1

Provides motor innervation to muscles in the neck and upper back, specifically sternocleidomastoid and trapezius muscles

Answer 1

CN XI Accessory Nerve

Question 2

Responsible for equilibrium and hearing

Answer 2

CN VIII Vestibulocochlear nerve

Question 3

Innervates the majority of eye muscles and carries preganglionic parasympathetic fibers that synapse at the ciliary ganglion; narrows the pupil and focuses the lens.

Answer 3

CN III occulomotor nerve

Question 4

Innervates the lateral rectus muscle of the eye

Answer 4

CN VI Abducens Nerve

Question 5

Provides only motor innervation to the muscles of the tongue

Answer 5

CN XII Hypoglossal Nerve

Question 6

Responsible for the sense of smell

Answer 6

CN I Olfactory Nerve

Question 7

Provides both sensory and motor fibers to the face through three main divisions: ophthalmic branch, maxillary branch, and mandibular branch. Can be used by a dentist for anesthesia injections

Answer 7

CN V Trigeminal Nerve

Question 8

Responsible for providing parasympathetic innervation to the organs in the thoracic and abdominal cavities; synapses with the cardiac, pulmonary and esophageal plexuses

Answer 8

CN X vagus nerve

Question 9

Functions as a mixed nerve (motor and sensory) that provides innervation to the tongue and throat; primary innervations to the parotid gland

Answer 9

CN IX Glossopharyngeal Nerve

Question 10

Responsible for vision

Answer 10

CN II optic nerve

Question 11

Innervates the superior oblique muscle of the eye as it passes through the trochlea

Answer 11

CN IV Trochlear Nerve

Question 12

Emerges from the stylomastoid foramen and travels through the parotid gland. Provides innervation to all the muscles of facial expression and taste receptors on the anterior 2/3 of the tongue; innervates tears, nasal and salivary glands.

Answer 12

CN VII Facial Nerve