Some people have an unusual merging of senses, where they routinely see colors in sounds or numbers, see time visually, or have other perception differences. Artists sometimes have synesthesia, and researchers are beginning to study it to see how it might be tapped to help the rest of us. Experts explain.
Dr. Joel Salinas has mirror touch synesthesia, a condition involving cross-wiring in the brain. The result is that visual stimuli prompt a response in his touch system. He literally feels it when people experience pain. Salinas discusses how this strange condition works and how he is able to use it in diagnosis.