Cranial nerve function

• CN I: Olfactory — Smell
• CN II: Optic — Vision
• CN III: Oculomotor — Extraocular movement, pupillary constriction, upper eyelid elevation, lens shape change
• CN IV: Trochlear — Downward and inward eye movement
• CN V: Trigeminal — Chewing, corneal reflex, face and scalp sensations
• CN VI: Abducens — Lateral eye movement
• CN VII: Facial — Expressions in forehead, eye, and mouth; taste
• CN VIII: Acoustic — Hearing and balance
• CN IX: Glossopharyngeal — Swallowing, salivating, and taste
• CN X: Vagus — Swallowing; gag reflex; talking; sensations of throat, larynx, and abdominal viscera
• CN XI: Spinal accessory — Shoulder movement and head rotation
• CN XII: Hypoglossal — Tongue movement