<P> Most of the skeletal musculature supplied by the cranial nerves (special visceral efferent) is pharyngeal . Exceptions include, but are not limited to, the extraocular muscles and some of the muscles of the tongue . These exceptions receive general somatic efferent innervation . </P> <P> All of the pharyngeal muscles that come from the first pharyngeal arch are innervated by the mandibular divisions of the trigeminal nerve . These muscles include all the muscles of mastication, the anterior belly of the digastric, the mylohyoid, tensor tympani, and tensor veli palatini . </P> <P> All of the pharyngeal muscles of the second pharyngeal arch are innervated by the facial nerve . These muscles include the muscles of facial expression, the posterior belly of the digastric, the stylohyoid muscle, the auricular muscle and the stapedius muscle of the middle ear . </P> <P> There is only one muscle of third pharyngeal arch, the stylopharyngeus . The stylopharyngeus and other structures from the third pharyngeal arch are all innervated by the glossopharyngeal nerve . </P>

The muscles of facial expression are derived from which of the pharyngeal gill arches