Stimulating brain cells with light can generate autism-like symptoms, Stanford University researchers reported in a mouse study that may provide clues on what causes the disease in people. The scientists implanted light-sensitive proteins into parts of the brain linked to social behavior in normal mice, and then activated them with blue lasers routed into the brain using fiber-optic cables. Normally gregarious mice didn’t socialize with other animals and developed a brain-wave pattern seen in some people with autism and schizophrenia. Their interest in exploring inanimate objects was normal, according to the results published online in the journal Nature.
