The Glossopharyngeal Nerve (Cranial Nerve IX)
The ninth cranial nerve is both a motor nerve, carrying afferent and efferent motor information, and a sensory nerve. Afferent means it is traveling from somewhere in the body to the brain.This only motor function is to elevate the pharynx. The sensory aspect of the glossopharyngeal nerve comes from the pharynx, tonsils, middle ear, and posterior third of the tongue. The ninth cranial nerve is responsible for the carotid sinus reflex. Sensory fibers receive information from the carotid bodies to detect blood pressure in the sinus of the carotid. If there is pressure applied to the carotid artery, then the body reacts by lowering its blood pressure.
- https://en.wikipedia.org/wiki/Glossopharyngeal_nerve Opens in new window
- Naik, A. 2011. Glossopharyngeal neuralgia [Internet]. Premier Specialty Center; [cited 2012 May 1]. Available from: http://drarunlnaik.com/glossopharyngeal_neuralgia Opens in new window