Which cranial nerve is involved in controlling the anterior two-thirds of the tongue?

Which cranial nerve is involved in controlling the anterior two-thirds of the tongue?

• A. The glossopharyngeal nerve (CN IX)
• B. The trigeminal nerve (CN V)
• C. The facial nerve (CN VII)
• D. The hypoglossal nerve (CN XII)

Answer: (C)

The correct answer is the facial nerve, also known as cranial nerve VII. This nerve is responsible for taste sensation from the anterior two-thirds of the tongue. It plays a significant role in conveying taste information from sensory receptors located in that area. These receptors send signals through the chorda tympani branch of the facial nerve, which then travels to the brain where the taste is processed. In addition to taste sensation, the facial nerve is also responsible for controlling the muscles of facial expression. This dual function underscores its importance in both sensory and motor functions associated with the face.

The correct answer is the facial nerve, also known as cranial nerve VII. This nerve is responsible for taste sensation from the anterior two-thirds of the tongue. It plays a significant role in conveying taste information from sensory receptors located in that area. These receptors send signals through the chorda tympani branch of the facial nerve, which then travels to the brain where the taste is processed.

In addition to taste sensation, the facial nerve is also responsible for controlling the muscles of facial expression. This dual function underscores its importance in both sensory and motor functions associated with the face.