The lingual branch of the glossopharyngeal nerve innervates the taste buds of the posterior 1/3 of the tongue and provides general sensation to this same area. The neuron cell bodies whose axons form the nerve, are found in the inferior ganglion of the glossopharyngeal nerve.
References
This article incorporates text in the public domain from page 909 of the 20th edition of Gray's Anatomy (1918)
