Cranial Nerves

Cranial Nerves:
12 pairs of cranial nerves:
I (olfactory; sensory)  disturbances in smell
II (optic; sensory)  disturbances in vision
III (occulomotor; motor)  disturbances in pupil constriction and eye movement (diplopia)
IV (trochlear; motor)  eye movement (diplopia)
V (trigeminal; both)  wasting of temporal muscles and masseters; decrease in facial sensation
VI (abducens; motor)  eye movement (diplopia)
VII (facial; both)  wasting of facial muscles; drooping of face; lacrimal secretions; taste
VIII (vestibulocochlear; sensory)  disturbances in hearing; dizziness
IX (glossopharyngeal; both)  tongue; taste; swallowing; dysarthria
X (vagus; both)  swallowing
XI (accessory; motor)  problems with movement of sternomastoids and trapezii (decreased strength)
XII (hypoglossal; motor)  problems with tongue movement

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