Cranial nerves are a set of 12 paired nerves that come directly from the brain. The first two (olfactory and optic) come from the cerebrum, with the remaining ten come from the brain stem. The names of the these nerves relate to what function they perform and are also numerically identified in roman numerals (I-XII). The nerves serve in functions of smell, sight, eye movement, and feeling in the face. These nerves also control balance, hearing, and swallowing.
Lesions to this nerve can be the result of:
Can the patient see?
Blumenfeld, Hal. Neuroanatomy through Clinical Cases. Sinauer, 2002.
Pauwels, Linda Wilson, et al. Cranial Nerves: Anatomy and Clinical Comments. Decker, 1988.
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