| Title |
Effect of the side of presentation in the visual field on phase-locked and nonphase-locked alpha and gamma responses |
| Authors |
Sarrias-Arrabal, Esteban , Martin-Clemente, Ruben , GALVAO CARMONA, ALEJANDRO, Luisa Benitez-Lugo, Maria , Vazquez-Marrufo, Manuel |
| External publication |
No |
| Means |
Scientific Reports |
| Scope |
Article |
| Nature |
Científica |
| JCR Quartile |
2 |
| SJR Quartile |
1 |
| JCR Impact |
4.6 |
| SJR Impact |
0.973 |
| Web |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85135243499&doi=10.1038%2fs41598-022-15936-7&partnerID=40&md5=efe9cd075f5dbdf70d940bd0647fa8c1 |
| Publication date |
01/08/2022 |
| ISI |
000834992200005 |
| Scopus Id |
2-s2.0-85135243499 |
| DOI |
10.1038/s41598-022-15936-7 |
| Abstract |
Recent studies have suggested that nonphase-locked activity can reveal cognitive mechanisms that cannot be observed in phase-locked activity. In fact, we describe a concomitant decrease in nonphase-locked alpha activity (desynchronization) when stimuli were processed (alpha phase-locked modulation). This desynchronization may represent a reduction in "background activity" in the visual cortex that facilitates stimulus processing. Alternatively, nonphase-locked gamma activity has been hypothesized to be an index of shifts in attentional focus. In this study, our main aim was to confirm these potential roles for nonphase-locked alpha and gamma activities with a lateralized Go/NoGo paradigm. The results showed that nonphase-locked alpha modulation is bilaterally represented in the scalp compared to the contralateral distribution of the phase-locked response. This finding suggests that the decrease in background activity is not limited to neural areas directly involved in the visual processing of stimuli. Additionally, gamma activity showed a higher desynchronization of nonphase-locked activity in the ipsilateral hemisphere, where the phase-locked activity reached the minimum amplitude. This finding suggests that the possible functions of nonphase-locked gamma activity extend beyond shifts in attentional focus and could represent an attentional filter reducing the gamma representation in the visual area irrelevant to the task. |
| Keywords |
attention; cognition; electroencephalography; photostimulation; physiology; vision; visual cortex; visual field; Attention; Cognition; Electroencephalography; Photic Stimulation; Visual Cortex; Visual Fields; Visual Perception |
| Universidad Loyola members |
|
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