cranial nerve development glossopharyngeal nerve development biological_process GO:0021563 CN IX development cranial nerve IX development cranial nerve 9 development Various sensory and motor branches of the glossopharyngeal nerve supply nerve connections to the pharynx and back of the tongue. The branchial motor component contains motor fibers that innervate muscles that elevate the pharynx and larynx, and the tympanic branch supplies parasympathetic fibers to the otic ganglion.