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Spatial extent of the optically induced suppression. A. Example of neural activity recordings in the focus, contralateral site, and ipsilateral-longitudinal site showing global suppression by 50 Hz optical stimulation with duration of 5 s(black line). B. Suppression percentages at the focus, contralateral site, and ipsilateral-longitudinal site. **, significant reduction of signal power, p<0.01.
