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CNs and Testing

Cranial nerves and methods of testing

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)
Created by: Hunter10
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