Cranial Nurves

CN I

Olfactory

• Sense of smell

CN II

Optic

• vision

CN III

Oculomotor

• Most eye movements

• Pupil constriction (parasympathetic)

• Eyelid elevation

CN IV

Trochlear

• Downward, inward eye movement

CN V

Trigeminal

• Sensory: face (touch, pain, temperature)

• Motor: chewing muscles (mastication)

CN VI

Abducens

• Lateral eye movement (abduction)

CN VII

Facial

• Motor: facial expression

• Sensory: taste (anterior 2/3 of tongue)

• Parasympathetic: lacrimal and salivary glands

CN VIII

Vestibulocochlear (Acoustic)

• Hearing

• Balance/equilibrium

CN IX

Glossopharyngeal

• Sensory: taste (posterior 1/3 of tongue), pharynx sensation

• Motor: swallowing, gag reflex

• Parasympathetic: parotid salivary gland

CN X

Vagus

• Motor: swallowing, speech

• Sensory: pharynx, thoracic/abdominal viscera

• Parasympathetic: heart rate, GI function

CN XI

Spinal Accessory

• Shoulder shrug (trapezius)

• Head turn (sternocleidomastoid)

CN XII

Hypoglossal

• Tongue movement (speech, swallowing)