Researchers have found evidence that suggests autism spectrum disorder (ASD) might not just be brain related. Instead, genetic mutations in peripheral sensory neurons could make those with ASD actually feel and sense the world differently – on a physical level – than those without it.
http://www.sciencealert.com/autism-isn-t-just-a-brain-disease-new-study-finds
http://www.cell.com/fulltext/S0092-8674(16)30584-0