Gamma oscillations in primate primary visual cortex are severely attenuated by small stimulus discontinuities
Open Access
- 14 June 2022
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLoS Biology
- Vol. 20 (6), e3001666
- https://doi.org/10.1371/journal.pbio.3001666
Abstract
Gamma oscillations (30 to 80 Hz) have been hypothesized to play an important role in feature binding, based on the observation that continuous long bars induce stronger gamma in the visual cortex than bars with a small gap. Recently, many studies have shown that natural images, which have discontinuities in several low-level features, do not induce strong gamma oscillations, questioning their role in feature binding. However, the effect of different discontinuities on gamma has not been well studied. To address this, we recorded spikes and local field potential from 2 monkeys while they were shown gratings with discontinuities in 4 attributes: space, orientation, phase, or contrast. We found that while these discontinuities only had a modest effect on spiking activity, gamma power drastically reduced in all cases, suggesting that gamma could be a resonant phenomenon. An excitatory–inhibitory population model with stimulus-tuned recurrent inputs showed such resonant properties. Therefore, gamma could be a signature of excitation–inhibition balance, which gets disrupted due to discontinuities.Funding Information
- The Wellcome Trust DBT India Alliance (IA/S/18/2/504003)
- Department of Biotechnology, Ministry of Science and Technology (DBT-IISc Partnership Programme)
This publication has 55 references indexed in Scilit:
- Corticocortical Feedback Contributes to Surround Suppression in V1 of the Alert PrimateJournal of Neuroscience, 2013
- Cortical Surround Interactions and Perceptual Salience via Natural Scene StatisticsPLoS Computational Biology, 2012
- Tuned Normalization Explains the Size of Attention ModulationsNeuron, 2012
- Stimulus‐induced dissociation of neuronal firing rates and local field potential gamma power and its relationship to the blood oxygen level‐dependent signal in macaque primary visual cortexEuropean Journal of Neuroscience, 2011
- Stimulus Selectivity and Spatial Coherence of Gamma Components of the Local Field PotentialJournal of Neuroscience, 2011
- Different Origins of Gamma Rhythm and High-Gamma Activity in Macaque Visual CortexPLoS Biology, 2011
- Differences in Gamma Frequencies across Visual Cortex Restrict Their Possible Use in ComputationNeuron, 2010
- Synchronization Dynamics in Response to Plaid Stimuli in Monkey V1Cerebral Cortex, 2009
- Instantaneous Modulation of Gamma Oscillation Frequency by Balancing Excitation with InhibitionNeuron, 2009
- Inhibitory Stabilization of the Cortical Network Underlies Visual Surround SuppressionNeuron, 2009