The Metastable Brain
Article Mar 13, 2014
Emmanuelle Tognoli, J. A. Scott Kelso
Summary: Neural ensembles oscillate across a broad range of frequencies and are transiently coupled or “bound” together when people attend to a stimulus, perceive, think, and act. This is a dynamic, self-assembling process, with parts of the brain engaging and disengaging in time. But how is it done? The theory of Coordination Dynamics proposes a mechanism called metastability, a subtle blend of integration and segregation. Tendencies for brain regions to express their individual autonomy and specialized functions (segregation, modularity) coexist with tendencies to couple and coordinate globally for multiple functions (integration). Although metastability has garnered increasing attention, it has yet to be demonstrated and treated within a fully spatiotemporal perspective. Here, we illustrate metastability in continuous neural and behavioral recordings, and we discuss theory and experiments at multiple scales, suggesting that metastable dynamics underlie the real-time coordination necessary for the brain’s dynamic cognitive, behavioral, and social functions.
Researchers have identified a mechanism by which brain-derived neurotrophic factor (BDNF) can suppress GABAergic transmission in hippocampus. In this article, Dr. Rajamani Selvam explains how he and his team achieved these results, and their potential impact on the treatment of neurological disease.READ MORE
A video showing the birth of an incredible network of neurons in the nervous system of a Zebrafish has won first prize at the Nikon Small World in Motion Awards, which highlight the best in photography and video captured through the microscope lens. We caught up with researchers behind the video to find out more.READ MORE