Definition of Facial nerve Facial nerve: The facial nerve is the
seventh cranial nerve. It is a mixed nerve that has fibers both
going out and coming in (both efferent and afferent fibers). It
supplies the muscles of facial expression. Paralysis of the
facial nerve causes a characteristic picture with drooping of
one side of the face, inability to wrinkle the forehead,
inability to whistle, inability to close the eye and deviation
of the mouth toward the other side of the face. Paralysis of the
facial nerve is called Bell's palsy.Source: MedTerms™ Medical
Dictionary Last Editorial Review: 4/27/2011 5:27:15 PM Medical
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