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Visual stimulus content in V4 is conveyed by gamma-rhythmic information packages by Lisitsyn, Dmitriy; Grothe, Iris; Kreiter, Andreas K.; Ernst, Udo A. is a scholarly article available to read on EtoBox.

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Selective visual attention allows the brain to focus on behaviorally relevant information while ignoring irrelevant signals. As a possible mechanism, routing-by-synchronization was proposed: neural populations receiving attended signals align their gamma-rhythmic activity to that of the sending populations, such that incoming spikes arrive at excitability peaks of receiving populations, enhancing signal transfer. Conversely, non-attended signals arrive unaligned to the receiver's oscillation, reducing signal transfer. Therefore, visual signals should be transferred through gamma-rhythmic bursts of information, resulting in a modulation of the stimulus content within the receiving population's activity by its gamma phase and amplitude. To test this prediction, we quantified gamma-phase-dependent stimulus content within neural activity from area V4 of two male macaques performing a visual attention task. For the attended stimulus, we find highest stimulus information content near excitability peaks, an effect that increases with oscillation amplitude, establishing a functional link between selective processing and gamma-activity. SIGNIFICANCE STATEMENTThe ability to focus on the beha

Author

Lisitsyn, Dmitriy; Grothe, Iris; Kreiter, Andreas K.; Ernst, Udo A.

Publisher

Society for Neuroscience (ISSN 0270-6474)

Published

2020

Language

EN