What are the three main divisions of the Trigeminal Nerve (CN V)?

The three main divisions of the Trigeminal Nerve, also known as CN V, are accurately identified as the Ophthalmic Nerve, Maxillary Nerve, and Mandibular Nerve. This cranial nerve is primarily responsible for sensation in the face and motor functions such as biting and chewing.

The Ophthalmic division provides sensory innervation to the forehead, upper eyelid, and parts of the nose, allowing for sensation in those areas. The Maxillary division serves the mid-facial region, supplying sensation to the cheeks, upper lip, and upper teeth. Lastly, the Mandibular division supplies both sensory and motor innervation; it conveys sensation from the lower jaw and motor control for the muscles of mastication. Understanding the functions and territories of these divisions is crucial for clinical practice, particularly in diagnosing and treating conditions related to facial pain or nerve disorders.