cranial nerves Flashcards
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What is the function of the olfactory nerve?
(I) Smell
Sensory: nose
What is the function of the optic nerve?
(II) Visual acuity
Sensory: eye
What is the function of the oculomotor nerve?
(III) Eye movement & pupil dilation
Motor: all eye muscles except those supplied by IV & VI
What is the function of the trochlear nerve?
(IV) Vertical eye movement
Motor: superior oblique muscle
What is the function of the trigeminal nerve?
(V) Facial sensation & expression
Sensory: face, sinuses, teeth, etc.; Motor: muscles of mastication
What is the function of the abducens nerve?
(VI) Lateral movement of eyeballs
Motor: external rectus muscle
What is the function of the facial motor nerve?
(VII) Facial expression
Motor: muscles of the face
What is the function of the vestibulocochlear nerve?
(VIII) Hearing & balance
Sensory: inner ear
What is the function of the glossopharyngeal nerve?
(IX) Taste & swallowing
Motor: pharyngeal musculature; Sensory: posterior part of tongue, tonsil, pharynx
What is the function of the vagus nerve?
(X) Sensation in throat, vocal cords & peristalsis
controls involuntary body fcn e.g. digestion, heart rate & immune system
Motor: heart, lungs, bronchi, gastrointestinal tract; Sensory: heart, lungs, bronchi, trachea, larynx, pharynx, gastrointestinal tract, external ear
What is the function of the accessory nerve?
(XI) Head & shoulder movement
Motor: sternocleidomastoid and trapezius muscles
What is the function of the hypoglossal nerve?
(XII) Tongue movement
Motor: muscles of the tongue
