University of Amsterdam - Swammerdam Institute of Life Sciences; Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society
When a visual stimulus is repeated, average neuronal responses typically decrease, yet they might maintain or even increase their impact through increased synchronization. Previous work has found that many repetitions of a grating lead to increasing gamma-band synchronization. Here we show in awake macaque area V1 that both, repetition-related reductions in firing rate and increases in gamma are specific to the repeated stimulus. These effects showed some persistence on the timescale of minutes. Further, gamma increases were specific to the presented stimulus location. Importantly, repetition effects on gamma and on firing rates generalized to natural images. These findings suggest that gamma-band synchronization subserves the adaptive processing of repeated stimulus encounters, both for generating efficient stimulus responses and possibly for memory formation.
Peter, Alina and Stauch, Benjamin J. and Shapcott, Katharine and Kouroupaki, Kleopatra and Schmiedt, Joscha Tapani and Klein, Liane and Klon-Lipok, Johanna and Dowdall, Jarrod Robert and Schölvinck, Marieke Louise and Vinck, Martin and Singer, Wolf and Schmid, Michael Christoph and Fries, Pascal, Stimulus-Specific Plasticity of Macaque V1 Spike Rates and Gamma. Available at SSRN: https://ssrn.com/abstract=3749650 or http://dx.doi.org/10.2139/ssrn.3749650
This version of the paper has not been formally peer reviewed.
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