Mylohyoid m.- mylohyoid is innervated by the nerve to mylohyoid, which is a branch of the inferior alveolar nerve. the inferior alveolar nerve is a branch of the mandibular division of the trigeminal nerve. geniohyoid is a muscle that spans from the mental spines of the mandible to the body of the hyoid bone-it elevates the hyoid and depresses the mandible. it is innervated by the ventral primary ramus of spinal nerve c1 via fibers carried by the hypoglossal nerve. hyoglossus is a tongue muscle; it is innervated by the hypoglossal nerve (cn xii). finally, stylohyoid is a muscle that spans from the styloid process to the hyoid bone. it elevates and retracts the hyoid, and it is innervated by the facial nerve.