Inferior ganglion of glossopharyngeal nerve

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Inferior ganglion of glossopharyngeal nerve
Plan of upper portions of glossopharyngeal, vagus, and accessory nerves. (Petrous ganglion visible near center.)
Latin Ganglion inferius nervi glossopharyngei, ganglion petrosum
glossopharyngeal nerve
Gray's p.98
TA A14.2.01.137
FMA 53475
Anatomical terms of neuroanatomy

The inferior ganglion of the glossopharyngeal nerve (petrous ganglion) is larger than the superior ganglion and is situated in a depression in the lower border of the petrous portion of the temporal bone.

It contains the bodies of general somatic sensory neurons(GSA fibers) that innervate the pharynx, tonsils, tongue, middle ear, auditory tube and the ear canal. It also contains the neurons that innervate the carotid sinus (mechanoreceptors)and carotid body (chemoreceptors) through the carotid nerve.

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This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

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