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Course and distribution of the glossopharyngeal, vagus, and spinal accessory nerves

The glossopharyngeal nerve mediates taste in the back third of the tongue. (Source: Gray H, Spitzka EA. Anatomy: Descriptive and Applied. Philadelphia and New York: Lea & Febiger, 1913. The original figure has been significantly cropped and modified to focus on the glossopharyngeal nerve by Dr. Douglas J Lanska.)

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