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.
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