NEET PG DENTAL EXAM

Detailed explanation-1: -The glossopharyngeal nerve is the ninth set of 12 cranial nerves (CN IX). It provides motor, parasympathetic and sensory information to your mouth and throat. Among its many functions, the nerve helps raise part of your throat, enabling swallowing.

Detailed explanation-2: -The sensory component of the glossopharyngeal nerve conveys information about taste and other sensations from the throat and the posterior third of the tongue. The motor component of this nerve controls the acts of swallowing and salivation, and the dilation of blood vessels.

Detailed explanation-3: -The glossopharyngeal nerve as noted above is a mixed nerve consisting of both sensory and motor nerve fibers. The sensory fibers’ origin include the pharynx, middle ear, posterior one-third of the tongue (including taste buds); and the carotid body and sinus. These fibers terminate at the medulla oblongata.

Detailed explanation-4: -The nucleus ambiguus is a motor nucleus located in the mid to upper medulla. It supplies the striated ("branchial") muscles of the pharynx, larynx, and upper esophagus via the ninth, tenth, and eleventh nerves.