Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.


Sci. Signal., 28 February 2012
Vol. 5, Issue 213, p. ec68
[DOI: 10.1126/scisignal.2002994]


Neuroscience Curbing the Other Side

Peter R. Stern

Science, AAAS, Cambridge CB2 1LQ, UK

The two hemispheres of the brain are connected via the corpus callosum; however, this pathway and its function are still not fully understood. Palmer et al. used a combination of optogenetic, calcium-imaging, and electrophysiological methods to investigate the cellular mechanism of interhemispheric inhibition of the firing frequency of neocortical layer 5 pyramidal neurons in rats in vivo and in vitro. They discovered that this form of inhibition involved interneurons in the top layers of the cortex that suppressed active dendritic currents synergistically recruited by back-propagating action potentials. This mechanism depended upon a {gamma}-aminobutyric acid type B receptor–mediated mechanism acting on specific ion channels in the dendrites of pyramidal neurons.

L. M. Palmer, J. M. Schulz, S. C. Murphy, D. Ledergerber, M. Murayama, M. E. Larkum, The cellular basis of GABAB-mediated interhemispheric inhibition. Science 335, 989–993 (2012). [Abstract] [Full Text]

Citation: P. R. Stern, Curbing the Other Side. Sci. Signal. 5, ec68 (2012).

To Advertise     Find Products

Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882