Signals that relay sensations from nerves into the brain are abnormally strong in people with autism. The findings, published 12 March inBrain, may explain why some people with autism are overly sensitive to sensory stimuli such as light, sound and touch1. In autism research, few findings are as complex as those surrounding brain connectivity, a measure of the synchronization between two brain areas. Many studies suggest that people with autism have unusually weak connectionsbetween brain regions, whereas other studies have found evidence for overconnectivity. Most scientists now agree that autism brains areinherently ‘noisy,’ with both overly weak and strong connections in the same brain.