30/03/2026
Comprehensive anatomical illustration of the Trigeminal nerve, the largest cranial nerve, demonstrating its origin from the brainstem and division at the Trigeminal (Semilunar) Ganglion into three branches-ophthalmic (V1), maxillary (V2), and mandibular (V3).
The ophthalmic division (V1) is purely sensory, supplying the forehead, scalp, cornea, and upper eyelid through branches like the lacrimal and nasociliary nerves. The maxillary division (V2), also sensory, innervates the midface, nasal cavity, maxillary sinus, and upper teeth via branches such as the Infraorbital nerve and superior alveolar nerves.
The mandibular division (V3) is a mixed nerve carrying both sensory and motor fibers. It supplies the lower face, mandibular teeth, anterior two-thirds of the tongue (general sensation via the Lingual nerve), and muscles of mastication. Key branches include the Inferior alveolar nerve, which gives rise to the mental nerve, and the auriculotemporal nerve supplying the temporal region.
This intricate neural network is essential for facial sensation, reflexes (like corneal reflex), and chewing movements. Clinically, it holds great importance in dental anesthesia, maxillofacial surgeries, and in conditions like Trigeminal neuralgia, where severe facial pain follows the distribution of one or more branches.
[Trigeminal nerve detailed anatomy, cranial nerve V branches explanation, ophthalmic maxillary mandibular divisions, trigeminal ganglion anatomy, facial sensory nerve supply, dental anesthesia nerves, inferior alveolar lingual nerve, infraorbital nerve anatomy, head and neck neuroanatomy, trigeminal neuralgia explanation]