part of part of innervates innervates branching part of branching part of nerve sensory nerve chin nerve of head region inferior alveolar nerve mental nerve SCTID:280138001 FMA:53250 UBERON:0018406 Wikipedia:Mental_nerve Mental nerve is a general somatic afferent (sensory) nerve which provides sensation to the anterior aspects of the chin and lower lip as well as the buccal gingivae of the mandibular anterior teeth and the premolars. It is a branch of the posterior trunk of the inferior alveolar nerve, which is itself a branch of the mandibular division of the trigeminal nerve (CN V). The nerve emerges at the mental foramen in the mandibula, and divides beneath the Depressor anguli oris muscle into three branches: one descends to the skin of the chin. two ascend to the skin and mucous membrane of the lower lip. These branches communicate freely with the facial nerve.