The brains of autistic children show few differences from those of children with attention deficit hyperactivity disorder, or even of controls.

Difficulties hearing and processing sounds are common in autism and may originate in the brainstem — offering the possibility of an inexpensive screen for the condition.

The brain’s emotion center, the amygdala, undergoes dramatic changes during the first year of life; these shifts may hold hints about its role in autism.

Any study of postmortem brains must control for artifacts, which are pervasive in brain tissue.

Some traits of autism are associated with obvious differences in brain structure, and the scope of these alterations may depend on the person’s sex.

A brain region that orchestrates responses to social cues and aids decision-making may be off tempo in autism.

A customizable Styrofoam mold minimizes head movements during brain scans, enabling researchers to produce clearer images.

Links between sensory and motor brain networks may be unusually weak in individuals with autism.

Watch the complete replay of Christine Wu Nordahl discussing new ways to expand participation in autism brain-imaging studies.

The brains of rats exposed in utero to the seizure drug valproate show a significant increase in brain size around the time of birth.