The significance of this phrase is to serve as a mnemonic device to help students of anatomy learn the twelve cranial nerves of the brain, which collectively innervate every muscle and sensory nerve in the human body. The capitalized letter in each word stands for:
(I) Olfactory
(II) Optic
(III) Oculomotor
(IV) Trochlear
(V) Trigeminal
(VI) Abducens
(VII) Facial
(VIII) Vestibulocochlear
(IX) Glossopharyngeal
(X) Vagus
(XI) Accessory
(XII) Hypoglossal
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