CN V
CN V, or the trigeminal nerve, is the fifth cranial nerve responsible for sensation in the face and motor functions such as biting and chewing. It has three major branches: ophthalmic, maxillary, and mandibular, each serving different areas of the face.
This nerve plays a crucial role in transmitting sensory information from the face to the brain, including touch, pain, and temperature. Additionally, it controls the muscles involved in mastication, making it essential for eating and speaking. Dysfunction of CN V can lead to conditions like trigeminal neuralgia, causing severe facial pain.