Definition

A nerve that runs from the brainstem, through openings in the skull, to the face and tongue. The facial nerve sends information between the brain and the muscles used in facial expression (such as smiling and frowning), some muscles in the jaw, and the muscles of a small bone in the middle ear. It also sends information to the front part of the tongue for the sense of taste and to the outer parts of the ear. The facial nerve also stimulates the glands that make tears and saliva. It is a type of cranial nerve. There are two facial nerves, one on each side of the face. Also called seventh cranial nerve.