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Best Answer: There are three cranial nerve involved in taste... The Facial Nerve carries information from the front 2/3 of the tongue. (Cranial Nerve VII) The Glossopharyngeal Nerve carries information from the back 1/3 of the tongure (Cranial Nerve IX) The Vagus Nerve also carries some taste information, but it's a minor component (Cranial Nerve X).
Hearing and sight are permenantly damaged, but scent can regenerate. Touch is not handled by cranial nerves, but rather by skin sensors which feed into the spinal cord and then run up into the brain. The distribution of skin nerves is uneven in most animals. In humans, touch is most sensitive in the lips, fingertips and genitals. Taste is probably handled by the facial nerve. It emerges directly from the brain and serves the area around the mouth. Taste buds are nerve endings and humans have three kinds. One responds to sugars and is located in the tip of the tongue.