Cranial Nerves Review Human A&P

What is the function of the Olfactory Nerve?

Smell (purely sensory).

What is the function of the Optic Nerve?

Vision (purely sensory).

What does the Oculomotor Nerve control?

Eye movement, eyelid raising, iris constriction, lens shape (motor).

What is the function of the Trochlear Nerve?

Controls superior oblique muscle for eye movement (motor).

What are the main functions of the Trigeminal Nerve?

Facial sensation (V1 & V2), chewing muscles (V3).

What muscle does the Abducens Nerve control?

Lateral rectus muscle for eye movement (motor).

What does the Facial Nerve control?

Facial expressions, taste (anterior 2/3 tongue), tear & saliva secretion.

What are the two branches of the Vestibulocochlear Nerve and their functions?

Vestibular – balance; Cochlear – hearing (mostly sensory).

What does the Glossopharyngeal Nerve do?

Taste (posterior 1/3 tongue), swallowing, parotid gland secretion.

What does the Vagus Nerve innervate?

Sensory/motor to throat, thoracic and abdominal organs (almost everywhere!).

What muscles does the Accessory Nerve control?

Trapezius and Sternocleidomastoid (motor only).

What is the function of the Hypoglossal Nerve?

Tongue movement (motor only).