Lateralization of chronic facial pain: fact or fiction.

Previous studies have shown that pain is generally reported more on the left side of the body. It has been hypothesized that patient report of left pain dominance may be due to the right hemisphere being less efficient in processing cutaneous sensory input while being dominant for emotional experience as compared with the left hemisphere of the brain. Only in cases of trigeminal neuralgia has self-report of pain been lateralized to the right side.