AI Article Synopsis

  • Rhythmic visual stimulation (RVS) impacts neuronal oscillations related to attention and affects task performance in visuo-spatial selective attention.
  • The study tested the effects of different RVS frequencies (10 Hz vs. 40 Hz) using a task where participants identified the orientation of a target triangle.
  • Results showed that 40 Hz RVS significantly improved reaction time compared to no RVS, while 10 Hz did not show notable effects, indicating that 40 Hz RVS enhances selective attention, particularly in the prefrontal cortex.

Article Abstract

Rhythmic visual stimulation (RVS) has been demonstrated to modulate ongoing neuronal oscillations which might be greatly involved in attention processes and thus bring some behavioral consequences. However, there was little knowledge about the effective frequency parameter of RVS which could impact task performance in visuo-spatial selective attention. Thus, here, we addressed this question by investigating the modulating effects of RVSs in different attention-related frequency bands, i.e., alpha (10 Hz) and gamma band (40 Hz). Sixteen participants were recruited to perform a modified visuo-spatial selective attention task. They were required to identify the orientation of target-triangle in visual search arrays while undergoing different RVS backgrounds. By analyzing the acquired behavioral and EEG data, we observed that, compared with control group (no RVS), 40 Hz RVS led to significantly shorter reaction time (RT) while 10 Hz RVS did not bring obvious behavioral consequences. In addition, although both 10 and 40 Hz RVS led to a global enhancement of SSVEP spectrum in the gamma band, 40 Hz RVS led to even larger 40 Hz SSVEP spectrum in prefrontal cortex. Our findings indicate that 40 Hz RVS has an effectively enhancing effect on selective attention and support the crucial role of prefrontal area in selective attention.

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Source
http://dx.doi.org/10.1109/EMBC46164.2021.9629497DOI Listing

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