pharyngeal nerve pharyngeal nerve the pharyngeal nerve is a small branch of the maxillary nerve, arising from the posterior part of the pterygopalatine ganglion. pharyngeal nervethe pterygopalatine ganglion and its branches. (pharyngeal visible at center right.)detailsfrompterygopalatine ganglionidentifierslatinnervus pharyngeusta98a14.2.01.044ta26223fma77524anatomical terms of neuroanatomy it passes through the palatovaginal canal with the pharyngeal branch of the maxillary artery, and is distributed to the mucous membrane of the nasal part of the pharynx, behind the auditory tube.