GENERAL HISTOLOGY

Detailed explanation-1: -Stimulation of the soft palate can also elicit the gag reflex; in this case, the sensory limb is the trigeminal nerve (CN V). Here, sensory stimulation of the soft palate travels through the nucleus of the spinal tract of the trigeminal nerve.

Detailed explanation-2: -Glossopharyngeal nerve lesions produce difficulty swallowing; impairment of taste over the posterior one-third of the tongue and palate; impaired sensation over the posterior one-third of the tongue, palate, and pharynx; an absent gag reflex; and dysfunction of the parotid gland.

Detailed explanation-3: -REFLEXES. The gag, or pharyngeal, reflex is centered in the medulla and consists of the reflexive motor response of pharyngeal elevation and constriction with tongue retraction in response to sensory stimulation of the pharyngeal wall, posterior tongue, tonsils, or faucial pillars.