Recent biomedical research has evidenced how Acupuncture positively affects the brain's pain response.   This TV documentary shows how Acupuncture switches off the body's pain matrix during a MRI patient scan (magnetic resonance imaging) mapping the two hemispheres of the brain.  The clip was featured in the BBC2 series Trust Me I'm a Doctor, showing a brain scan whilst the patient received acupuncture provided by a Traditional Acupuncturist, Hugh MacPherson.  The purposes was to explore potential mechanisms of how acupuncture works.