and the 12 cranial nerves of the brain. These nerves are involved in smell, vision, pupil activity, eye movement, taste, hearing, swallowing, and movement of the face, neck, and shoulders.

Trigeminal neuralgia (TN) is an intensely painful condition in which the trigeminal, or fifth cranial nerve, becomes irritated. TN can be an early symptom of multiple sclerosis. People who have ...