Which muscle originates from 1st pharyngeal arch?: (A) Buccinator, (B) Posterior belly of digastric, (C) Masseter, (D) Stylopharyngeus
Answer is C. Arch 1 : Mandibular arch Muscle derivatives Muscles of mastication (temporalis, masseter, medial/lateral pterygoid), mylohyoid, anterior belly of digastric, tensor veli palatini, tensor tympani Innervated by V3 of the trigeminal nerve (CN5) Aoic arch 1 becomes pa of the maxillary aery