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视觉注意网络中的眼优势和功能不对称性。

Ocular Dominance and Functional Asymmetry in Visual Attention Networks.

机构信息

Department of Forensic Science, Soochow University, Suzhou, China.

Institute of Medical Psychology, Otto-von-Guericke University Magdeburg, Leipziger Strasse 44, 39120 Magdeburg, Germany.

出版信息

Invest Ophthalmol Vis Sci. 2021 Apr 1;62(4):9. doi: 10.1167/iovs.62.4.9.

DOI:10.1167/iovs.62.4.9
PMID:33825854
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8039471/
Abstract

PURPOSE

The dorsal attention network (DAN) and the ventral attention network (VAN) are known to support visual attention, but the influences of ocular dominance on the attention networks are unclear. We aimed to explore how visual cortical asymmetry of the attention networks correlate with neurophysiological oscillation and connectivity markers of attentional processes.

METHODS

An oddball task with concentric circle stimuli of three different sizes (i.e., spot size of 5°, 20°, or 30° of visual angle) was used to vary task difficulty. Event-related oscillations and interareal communication were tested with an electroencephalogram-based visual evoked components as a function of ocular dominance in 30 healthy subjects.

RESULTS

Accuracy rates were higher in the dominant eyes compared with the nondominant eyes. Compared with the nondominant eyes, the dominant eyes had higher theta, low-alpha, and low-beta powers and lower high-alpha powers within the nodes of VAN and DAN. Furthermore, visual information processed by the dominant and nondominant eye had different fates, that is, the dominant eyes mainly relied on theta and low-alpha connectivity within both the VAN and the DAN, whereas the nondominant eyes mainly relied on theta connectivity within the VAN and high-alpha connectivity within the DAN. The difference in accuracy rate between the two eyes was correlated with the low-alpha oscillations in the anterior DAN area and low-alpha connectivity of the left DAN.

CONCLUSIONS

The ocular dominance processing and interareal communication reveal a cortical asymmetry underlying attention, and this reflects a two-way modulatory mechanism within attention networks in the human brain.

摘要

目的

已知背侧注意网络（DAN）和腹侧注意网络（VAN）支持视觉注意，但眼球优势对注意网络的影响尚不清楚。我们旨在探讨注意网络的视觉皮层不对称性与注意过程的神经生理振荡和连接标记物如何相关。

方法

使用具有三个不同大小（即视角为 5°、20°或 30°的光斑大小）同心圆刺激的Oddball 任务来改变任务难度。通过基于脑电图的视觉诱发成分，在 30 名健康受试者中，根据眼球优势测试与注意力过程相关的事件相关振荡和区域间通信。

结果

与非优势眼相比，主导眼的准确率更高。与非优势眼相比，主导眼在 VAN 和 DAN 的节点中具有更高的θ、低α和低β功率以及更低的高α功率。此外，主导眼和非主导眼处理的视觉信息具有不同的命运，即主导眼主要依赖于 VAN 和 DAN 内的θ和低α连通性，而非主导眼主要依赖于 VAN 内的θ连通性和 DAN 内的高α连通性。双眼之间的准确率差异与前 DAN 区域的低α振荡和左 DAN 的低α连通性相关。

结论

眼球优势处理和区域间通信揭示了注意力背后的皮层不对称性，这反映了人类大脑中注意网络内的双向调节机制。

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