Cranial Nerves and Functions

Olfactory

Reception and interpretation of smell

Optic

Visual acuity and visual fields

Oculomotor

Many eye movements

Raise the eyelids

Pupil constriction

Trochlear

Inward and downward eye movement

Trigeminal

Opening and closing the jaw (chewing)

Abducens

Lateral eye movement

Facial

Facial expression

Eye closure

Lip speech sounds

Taste/sensation anterior 2/3 of tongue

Pharyngeal sensation

Acoustic

Sense of hearing and equilibrium

Glossopharyngeal

Muscle for swallowing and guttural speech

Gag reflex

Taste sensation on posterior 1/3 of tongue

Nasopharyngeal sensation

Vagus

Sensation behind the ear and in portion of ear canal

Involuntary control of heart and lungs

Spinal

Shrug shoulders and turn head

Hypoglossal

Tongue movement

Swallowing

Speech sounds involving the tongue