Brain Tumor Surgery Specialist in Pune. Trigeminal Neuralgia Surgeon The term Trigeminal Neuralgia (TN), has two words within it. Trigeminal nerve is one of the (twelve) cranial (head) nerves which has three divisions (ophthalmic, maxillary, and mandibular) supplying to the areas of upper eye-lid to the lower chin. Neuralgia means pain. TN is a disorder of the Trigeminal nerve which presents as facial pain and headache. The pain is characteristically severe, intense, sharp, episodic, periodical, excruciating, stabbing and short lasting. Trigeminal nerve is the largest of twelve cranial nerves. All sensations from the face and mouth are covered by the Trigeminal nerve. One of the branches of the Trigeminal is often injected by your dentist while working on your dental cavity. Brain Tumor Surgery Specialist in Pune.