hypoglossal nerve [CN XII]
Definition: arises from an oblong nucleus in the medulla and emerges by several root filaments between the pyramid and the oliva via the preolivary groove; it passes through the hypoglossal canal, then courses downward and forward to supply the intrinsic and four of five extrinsic muscles of the tongue.
Synonym(s): nervus hypoglossus [CN XII]TA, twelfth cranial nerve [CN XII]
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