Which cranial nerve is primarily responsible for facial sensations?

The cranial nerve primarily responsible for facial sensations is the Trigeminal nerve. This nerve, also known as CN V, has three major branches that correspond to different areas of the face: the ophthalmic, maxillary, and mandibular branches. Each of these branches innervates specific regions of the face, providing sensory input such as touch, pain, and temperature.

The function of the Trigeminal nerve is crucial for activities such as feeling sensations on the skin of the face, detecting stimuli in the mouth, and facilitating actions related to chewing through its motor functions. Therefore, when considering which cranial nerve plays the key role in facial sensation, the Trigeminal nerve stands out as the definitive answer due to its comprehensive sensory coverage across the face.