Children with autism who have both severe repetitive behaviors and sensory sensitivities tend to have had unusually structured nerve tracts in infancy.

A minority of boys with autism have brains that are unusually large relative to their bodies — a trait tied to regression and intellectual disability.

The strength and synchrony of brain waves appear to evolve differently in children with autism than in their neurotypical peers.

The brains of people with autism show a distinct molecular signature that reflects alterations in how genes are pieced together and expressed.

The brains of many people with autism may exhibit a characteristic arrangement of chemical groups on the proteins that DNA coils around.

The brains of people with autism contain unusual amounts of short regulatory RNAs.

A fluke finding hints that the growth of blood vessels in the brain runs amok in people with autism.

The first effort to sequence genes tied to autism in postmortem brain tissue reveals a range of harmful mutations in people with the condition.

The mutation that leads to Angelman syndrome may affect the brains of female mice more severely than those of male mice.

Mice carrying any one of five autism-linked mutations struggle to associate a flash of light with an irritating puff of air. The findings suggest that the mice have trouble integrating information from multiple senses — a skill governed by the cerebellum.