On the other side of the tent Dennis Drayna, from the National Institute on Deafness and Other Communication Disorders, in Maryland, was studying hearing.

ECONOMIST: Twin research

This could uncover basic truths about the brain and, researchers say, may eventually help scientists better understand disorders of communication, such as autism.

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It includes a number of changes for childhood disorders, including new diagnoses such as social communication disorder and global developmental delay, and broadened criteria for learning disorders.

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Police have used the pipe for communication and to deliver the boy medication for his emotional disorders.

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Autism, more precisely the autism spectrum, is a range of brain disorders that can cause difficulties in social interaction, communication and behavior.

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