All jaw closing muscles are derived from the first visceral arch and are innervated by the mandibular branch of the trigeminal nerve ([[Nervous System - CNS - Anatomy & Physiology#Innervation - Cranial Nerves|CN V3]]) | All jaw closing muscles are derived from the first visceral arch and are innervated by the mandibular branch of the trigeminal nerve ([[Nervous System - CNS - Anatomy & Physiology#Innervation - Cranial Nerves|CN V3]]) |