In Brief

Postmortem brains from adults with autism have lower-than-normal levels of the fragile X mental retardation protein, which is missing in individuals with fragile X syndrome.

A well-studied mouse model of autism has a smaller-than-normal volume in several autism-associated brain regions.

A massive association study links five new genetic regions to schizophrenia and implicates MIR137, a regulatory RNA that plays a role in neuron development, in the disorder.

A large epidemiological study in Utah that relies on tax information and health records shows that income level does not affect the odds of having a child with autism or intellectual disability.

An autism-linked protein helps wire neurons together, according to two studies published in late September.