One readily noticeable pathognomonic trait of autism is hand-flapping—a stereotyped motor movement that can look a bit like an attempt to accelerating the drying of nail polish. Not all with autism do ...

Repetitive motor behaviors (RMBs) such as hand flapping and rocking occur in more than one third of toddlers who do not meet diagnostic criteria for autism spectrum disorder (ASD), with higher rates ...

Most people picture autism as a behavioral condition. Rocking. Repetitive routines. Meltdowns in the grocery store. Those things can be part of the picture, but they tend to show up later. What ...