Individual Readiness Assurance Test (iRAT) 4 Head and Neck Practice Test

The anterior belly of the digastric is innervated by the mandibular division of the trigeminal nerve (V3). This muscle is derived from the first pharyngeal arch and receives motor innervation via the nerve to mylohyoid, a branch of the inferior alveolar nerve, which comes from V3. The other divisions of the trigeminal nerve are sensory (V1 and V2) or, in the case of the facial nerve, a different nerve altogether, so they do not supply this muscle.