[TA] the third division of the trigeminal nerve formed by the union of sensory fibers from the trigeminal ganglion and the motor root of the trigeminal nerve in the foramen ovale, through which the nerve emerges; its branches are: meningeal, masseteric, deep temporal, lateral and medial pterygoid, buccal, auriculotemporal, lingual, and inferior alveolar; its sensory fibers are distributed to the auricle, external acoustic meatus, tympanic membrane, temporal region, cheek, skin overlying the mandible (except its angle), anterior two thirds of tongue, floor of mouth, lower teeth, and gingiva; its motor fibers innervate all the muscles of mastication plus the mylohyoid, anterior belly of the digestive, and the tensores veli palati and tympani. SYN: nervus mandibularis [CN V3] [TA], inferior maxillary nerve.