Visually and Optogenetically Induced Brain Waves Are Virtually Identical (image) Technische Universitaet Muenchen Share Print E-Mail Caption These measurements were made by optically recording the flux of calcium ions in optogenetically transduced neurons in a mouse's brain. In the train of four consecutive brain waves shown here, optogenetically induced waves (OG) alternate with waves evoked by visual stimulation (sun symbol). A striking feature is the virtually identical pattern of the visually and optogenetically evoked waves -- keeping in mind that less than 100 neurons in the cortex have been optogenetically stimulated. Stimulating these few neurons leads to the generation of a wave recruiting the entire cortex. Credit Prof. Albrecht Stroh, Prof. Arthur Konnerth / Copyright TU Muenchen Usage Restrictions This image may be freely used, with copyright noted, in news coverage of this research. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.