Which cranial nerve has a sensory function related to taste in the anterior two-thirds of the tongue?

The cranial nerve responsible for the sensory function related to taste in the anterior two-thirds of the tongue is the Facial nerve, known as cranial nerve VII (CN VII). This nerve plays a crucial role in taste sensation through its chorda tympani branch, which carries taste fibers from the tongue.

In addition to taste, the Facial nerve is also involved in controlling the muscles of facial expression, and it provides some sensory input from the external ear. Its role in taste sensation is critical, as it allows for the perception of flavors in the anterior portion of the tongue, providing an essential aspect of the overall taste experience.

Understanding the function of this nerve is significant for clinical assessments, as impairments can lead to a diminished ability to taste, which can affect nutrition and overall quality of life. The other cranial nerves listed do not have a primary role in taste sensation in this specific area of the tongue; thus, they do not fulfill the requirements of the question.