"The nucleus ambiguus is a large longitudinal nucleus within the medulla oblongata that provides motor innervation to muscles of the pharynx, larynx and soft palate in addition to housing preganglionic nuclei involved in the parasympathetic nervous system augmentation of heart rate 1,2."
"The nucleus ambiguus also provides motor innervation to the superior, middle and inferior pharyngeal constrictor muscles in addition to the muscles of the soft palate (palatopharyngeus, salpingopharyngeus, levator veli palatini, palatoglossus and the muscles of the uvula). These efferent fibres arising from the nucleus ambiguus travel through pharyngeal branches of the vagus nerve (CN X) which arise from the inferior (nodose) vagal ganglion."
"The nucleus ambiguus also provides motor innervation to the superior, middle and inferior pharyngeal constrictor muscles in addition to the muscles of the soft palate (palatopharyngeus, salpingopharyngeus, levator veli palatini, palatoglossus and the muscles of the uvula). These efferent fibres arising from the nucleus ambiguus travel through pharyngeal branches of the vagus nerve (CN X) which arise from the inferior (nodose) vagal ganglion."