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facial nerve
the seventh cranial nerve; its motor fibers supply the muscles that move the eyebrows, the skin of the forehead, the corners of the mouth, and other
parts of the face involved in frowning, smiling, and other expressions of emotion. The sensory fibers of the facial nerve
provide a sense of taste in the front two-thirds of the tongue, and also supply various glands in the mouth. Irritation of
the facial nerve can cause a paralytic condition of the face known as Bell palsy.
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