NEET PG DENTAL EXAM

Detailed explanation-1: -The gag reflex is mediated by the glossopharyngeal nerve (CN IX) and the vagus nerve (CN X). Embryologically, the glossopharyngeal nerve is associated with the derivatives of the third pharyngeal arch, while the vagus nerve is associated with the derivatives of the fourth and sixth pharyngeal arches.[2]

Detailed explanation-2: -CN 9 is mainly sensory supplying the mucous membranes of the soft palate and pharynx; it serves as the afferent limb of the gag reflex. In addition to supplying thoracic and abdominal viscera the CN 10 innervates the muscles of the pharynx, palate and vocal cords and so controls phonation and swallowing.

Detailed explanation-3: -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.