A protein that regulates the development of serotonin-producing neurons in the brain is associated with autism.

Methylation marks were thought to be permanent features of the genome, but a new study challenges that idea.

Boys who have autism-like social deficits at 2 years of age retain about the same level of social impairment when they reach age 20.

Two new studies suggest that people with autism don’t all have trouble detecting the motion of people and animals. What they do struggle with is picking up social information from bodies in motion.

Neurons in a mouse model of fragile X syndrome make more connections during a critical period in development compared with controls, but are slower to respond to signals.

Probiotic bacteria alleviate stress in healthy mice and modify the expression of receptors for a chemical messenger that inhibits signaling in the brain.

A new atlas of gene expression patterns in the adult mouse brain shows how thousands of genes are turned on in specific layers of the cortex.

Children with autism carry many more spontaneous point mutations in genes expressed in the brain compared with their unaffected siblings, according to unpublished findings presented Monday at the World Congress of Psychiatric Genetics in Washington, D.C.

Individuals with fragile X syndrome make slightly more eye contact in stressful social situations after taking oxytocin compared with placebo.

A variant of the FGF14 gene may decrease the volume of the amygdala, a brain structure needed to interpret emotions in facial expressions, according to results presented on Sunday at the World Congress of Psychiatric Genetics in Washington, D.C.