The mouse brain has more than 1,300 regions for which the copy from one parent is expressed more often than the one from the other parent, according to two studies published today in Science. These so-called imprinted genes have been proposed to cause some cases of autism, but the researchers say their findings do not support that theory.

FMRP, the protein missing in fragile X syndrome, is needed for the birth of new neurons, for regulating the translation of RNA into protein, and for maintaining the structural integrity of spiny neuronal projections, according to several new studies.

Two independent teams have discovered key molecular steps in the way a single gene disrupts the connections between neurons in individuals with Angelman syndrome. Because the gene, UBE3A, has also been linked to autism, the findings could help scientists understand and treat a range of neurodevelopmental disorders.

There are several short periods during development in which our brains are ‘plastic’ — meaning that neuronal connections appear and disappear depending on how much they are used. Researchers may have found a way to reopen those learning windows.

A chilling new technique shows the intricate and coordinated activity of previously mysterious pieces of the synapse, the all-important junction between neurons that allows cells to talk to each other.

Scientists have for the first time found direct evidence that defects in the GABA receptor sometimes give rise to autism, according to research published 24 November in Molecular Psychiatry.

A newer version of the psychiatric manual may expand the definition of autism, folding in Asperger syndrome and pervasive developmental disorder not otherwise specified.

Researchers at the Society for Neuroscience today described a new test for animal behavior that doesn’t interfere with normal mouse behavior, doesn’t require human interaction, and makes it simple to take long-term measurements: the ‘licking testʼ.