Sociability may be skin deep. The social impairments and high anxiety seen in people with autism or related disorders may be partly due to a disruption in the nerves of the skin that sense touch, a new study in mice suggests.
Autism spectrum disorders are primarily thought of as disorders of the brain, generally characterized by repetitive behaviors and deficits in communication skills and social interaction. But a majority of people with autism spectrum disorders also have an altered tactile sense; they are often hypersensitive to light touch and can be overwhelmed by certain textures. “They tend to be very wary of social touch [like a hug or handshake], or if they go outside and feel a gust of wind, it can be very unnerving,” says neuroscientist Lauren Orefice from Harvard Medical School in Boston.
An appreciation for this sensory aspect of autism has grown in recent years. The newest version of psychiatry’s bible, the Diagnostic and Statistical Manual of Mental Disorders, includes the sensory abnormalities of autism as core features of the disease. “That was a big nod and a recognition that this is a really important aspect of autism,” says Kevin Pelphrey, a cognitive neuroscientist at The George Washington University in Washington, D.C., who was not involved in the work.
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