Nerve: | Afferent (Sensory): | Efferent (Motor): | Test: |
Olfactory | Smell: nose | | Identify familiar odors |
Optic | Sight: eye | | Test visual fields |
Oculomotor | | Voluntary motor: levator of eyelid; superior, medial and inferior recti; inferior oblique muscle of eyeball. Autonomic: smooth muscle of eyeball | Upward, downward and medial gaze. Reaction to light |
Trochlear | | Voluntary motor: superior oblique muscle of eyeball | Downward and lateral gaze |
Trigeminal | Touch, pain: skin of face, mucous membranes of nose, sinuses, mouth, anterior tongue | Voluntary motor: muscles of mastication | Corneal reflex. Face sensation. Clench teeth; push down on chin to seperate jaws |
Abducens | | Voluntary motor: lateral rectus muscle of eyeball | Lateral gaze |
Facial | Taste: anterior tongue | Voluntary motor: facial muscles. Autonomic: lacrimal, submandibular, and sublingual glands | Close eyes tight. Smile and show teeth. Whistle and puff cheeks. Identify familiar tastes |
Vestibulocochlear (acoustic nerve) | Hearing: ear
Balance: ear | | Hear watch ticking; hearing tests; balance and coordination tests |
Glossoppharyngeal | Touch, pain: posterior tongue, pharynx
Taste: posterior tongue | Voluntary motor: uninportant muscle of pharynx.
Autonomic: parotid gland | Gag reflex
Ability to swallow |
Vagus | Touch, pain: pharynx, larynx, bronchi
Taste: tongue, epiglottis | Voluntary motor: palate, pharynx, and larynx muscles
Autonomic: thoracic and abdominal viscera | Gag reflex
Ability to swallow
Say "Ahhh" |
Accessory | | Voluntary motor: sternocleidomastoid and trapezius muscle | Resisted shoulder shrug |
Hypoglossal | | Voluntary motor: muscles of tongue | Tongue protrusion (if injured, tongue deviates toward injured side) |