Scientists have discovered more than 100 new proteins at junctions in the brain that dampen neuronal activity.

An experimental drug called arbaclofen improved autism features in about 13 percent of people who took it in a shuttered clinical trial.

Our infographic displays efforts to develop treatments for fragile X syndrome. So far, none of them have passed muster in clinical trials.

Neurons generated from the skin cells of individuals with fragile X syndrome show different combinations of features associated with the syndrome.

Two mouse models of autism have distinct patterns of brain connectivity that emerge at different times.

A gene that keeps protein production in check is mutated in some people with autism.

A set of seven standard tests can accurately assess cognitive capacities in people with various types of intellectual disability.

A group of savvy parents jump-started autism research in California, but they also set the research agenda.

An inexpensive new set of tests allows researchers to rapidly analyze the genetic glitch underlying fragile X syndrome.

Meet the backyard marijuana growers and home chemists who are rushing in where scientists fear to tread.