NEET PG DENTAL EXAM

Detailed explanation-1: -The vagus nerve has branches within the neck; these branches are the pharyngeal branches, superior laryngeal nerves, recurrent laryngeal nerves, and superior cardiac nerves.

Detailed explanation-2: -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-3: -The glossopharyngeal nerve has two ganglia associated with it – a superior and inferior ganglion. The superior ganglion transmits visceral sensory fibers from the carotid sinus and body, pharynx and parotid gland and the middle ear.

Detailed explanation-4: -The glossopharyngeal and vagus cranial nerves provide the brainstem with sensory inputs from different receptors in the heart, lung, and vasculature. This afferent information is critical for the short-term regulation of arterial blood pressure and the buffering of emotional and physical stressors.