Glossopharyngeal nerve

Definition

The glossopharyngeal nerve is the ninth cranial nerve (CN IX) that is involved in swallowing, taste, and the sensation of the back third of the tongue, as well as contributing to blood pressure regulation. It innervates both motor and sensory functions in the throat (pharynx), including salivary glands and baroreceptors of the carotid artery.

Related terms

Cranial nerves: Twelve pairs of nerves that originate directly from the brain, not through the spinal cord, serving diverse functions such as sensory input, motor skills, or both.

Baroreceptors: Sensory receptors located primarily in the carotid sinus and aortic arch that sense changes in blood pressure and help regulate it.

Pharynx: A muscular tube that forms part of both the digestive system and respiratory system, aiding in breathing, swallowing, and speech