The biology of obsessive-compulsive disorder becomes even more baffling with the release of two new mouse models, each implicating a different type of brain cell.

Microglia, brain cells that provide immune protection to neurons, may influence the onset and course of Rett syndrome, according to a study published in the Journal of Neuroscience.

The brains of people with autism show high levels of inflammation compared with controls, suggests a study of postmortem brain tissue from 11 individuals with autism, presented at a poster session Monday at the Society for Neuroscience meeting in Chicago.