3.8 Article

Stochastic resonance and 'gamma band' synchronization in the human visual system

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IBRO NEUROSCIENCE REPORTS
卷 10, 期 1, 页码 191-195

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DOI: 10.1016/j.ibneur.2021.03.001

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The study observed linear and inverted-U distributions of electrophysiological responses to visual contrast stimulation in humans, possibly related to stochastic resonance models. Replication in larger samples is needed, further research on the mechanisms of neuronal synchronization and visual processing is warranted.
Cortical synchronization in the gamma-frequency range (above similar to 30.0 Hz) and the signal/noise interplay described by stochastic resonance models have been proposed as basic mechanisms in neuronal synchronization and sensory information processing, particularly in vision. Here we report an observation in humans of linear and inverted-U distributions of the electrophysiological (EEG) responses to visual contrast stimulation in the gamma band and in the low frequency components of the visual evoked responses (VER), respectively. The combination of linear and inverted-U distributions is described by a stochastic resonance model (SR). The observation needs replication in larger subjects' samples. It nevertheless adds to the available evidence of a role of gamma oscillatory signals and SR mechanisms in neuronal synchronization and visual processing. Some functional adaptation in human vision appears conceivable and further investigation is warranted.

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