Which cranial nerves are involved in gustation?

Which cranial nerves are involved in gustation?

• A. The facial nerve and the glossopharyngeal nerve.
• B. The vestibulocochlear nerve and the trigeminal nerve.
• C. The olfactory nerve and the optic nerve.
• D. The hypoglossal nerve and the accessory nerve.

Answer: (A)

Gustation is carried by specific cranial nerves that convey taste signals from taste buds to the brain. The front two-thirds of the tongue sends taste information through the chorda tympani branch of the facial nerve, while the back one-third sends it through the glossopharyngeal nerve. These two nerves supply the primary gustatory afferents for the tongue, directing taste information to the brain for interpretation. The other nerves mentioned have different functions: the vestibulocochlear nerve handles hearing and balance; the trigeminal nerve provides general sensation (not taste) from the face and tongue; the olfactory and optic nerves handle smell and vision; and the hypoglossal and accessory nerves control tongue movement and neck muscles.

Gustation is carried by specific cranial nerves that convey taste signals from taste buds to the brain. The front two-thirds of the tongue sends taste information through the chorda tympani branch of the facial nerve, while the back one-third sends it through the glossopharyngeal nerve. These two nerves supply the primary gustatory afferents for the tongue, directing taste information to the brain for interpretation. The other nerves mentioned have different functions: the vestibulocochlear nerve handles hearing and balance; the trigeminal nerve provides general sensation (not taste) from the face and tongue; the olfactory and optic nerves handle smell and vision; and the hypoglossal and accessory nerves control tongue movement and neck muscles.