ANATOMY

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: -As stated above, the glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle, which is responsible for elevating the pharynx and larynx.

Detailed explanation-3: -To assess for taste impairment, the doctor may use bitter and sour substances to test the posterior one-third of the tongue. The patient’s overall sensation and taste on the posterior part of the tongue can be tested to determine the integrity of the glossopharyngeal nerve.

Detailed explanation-4: -Glossopharyngeal neuralgia is a rare condition in which there are repeated episodes of severe pain in the tongue, throat, ear, and tonsils. This can last from a few seconds to a few minutes. Glossopharyngeal neuralgia is believed to be caused by irritation of the ninth cranial nerve.

Detailed explanation-5: -They’re the glossopharyngeal, number nine, the vagus, number ten, the accessory, number eleven, and the hypoglossal, number twelve. These four nerves leave the skull close together.