Trigeminal nerve (CN V)

The trigeminal nerve (cranial nerve V) is a major nerve responsible for sensation in the face and controlling muscles involved in biting and chewing. It has three main branches: ophthalmic (forehead and eyes), maxillary (cheek and upper jaw), and mandibular (lower jaw). This nerve helps you feel touch, pain, and temperature in your face, while also enabling movements of the jaw muscles. It is essential for facial sensation and functions related to chewing, making it vital for daily activities and facial expression.