Through which nerve is posterior tongue taste conveyed?

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Multiple Choice

Through which nerve is posterior tongue taste conveyed?

Explanation:
Taste from the posterior third of the tongue is carried by the glossopharyngeal nerve (CN IX). This nerve transmits the taste signals from those taste buds to the brainstem. The facial nerve handles taste from the anterior two-thirds via the chorda tympani, while the trigeminal nerve provides general sensation (not taste). The hypoglossal nerve only motor-to-tongue muscles, and the vagus nerve carries taste from the epiglottis (not primarily from the posterior tongue). So for the posterior tongue, CN IX is the correct conduit.

Taste from the posterior third of the tongue is carried by the glossopharyngeal nerve (CN IX). This nerve transmits the taste signals from those taste buds to the brainstem. The facial nerve handles taste from the anterior two-thirds via the chorda tympani, while the trigeminal nerve provides general sensation (not taste). The hypoglossal nerve only motor-to-tongue muscles, and the vagus nerve carries taste from the epiglottis (not primarily from the posterior tongue). So for the posterior tongue, CN IX is the correct conduit.

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