University of Salzburg.
Radboud University, Nijmegen, The Netherlands.
J Cogn Neurosci. 2022 May 2;34(6):1001-1014. doi: 10.1162/jocn_a_01843.
Ongoing fluctuations in neural excitability and connectivity influence whether or not a stimulus is seen. Do they also influence which stimulus is seen? We recorded magnetoencephalography data while 21 human participants viewed face or house stimuli, either one at a time or under bistable conditions induced through binocular rivalry. Multivariate pattern analysis revealed common neural substrates for rivalrous versus nonrivalrous stimuli with an additional delay of ∼36 msec for the bistable stimulus, and poststimulus signals were source-localized to the fusiform face area. Before stimulus onset followed by a face versus house report, fusiform face area showed stronger connectivity to primary visual cortex and to the rest of the cortex in the alpha frequency range (8-13 Hz), but there were no differences in local oscillatory alpha power. The prestimulus connectivity metrics predicted the accuracy of poststimulus decoding and the delay associated with rivalry disambiguation suggesting that perceptual content is shaped by ongoing neural network states.
神经兴奋性和连通性的持续波动会影响是否能看到刺激。它们是否也会影响看到的刺激？我们在 21 名人类参与者观看面孔或房屋刺激时记录了脑磁图数据，这些刺激要么一次一个，要么在通过双眼竞争产生的双稳态条件下呈现。多变量模式分析显示，竞争与非竞争刺激有共同的神经基础，双稳态刺激有大约 36 毫秒的额外延迟，并且刺激后的信号被定位到梭状回面孔区。在跟随面孔与房屋报告的刺激前，梭状回面孔区与初级视觉皮层以及在 alpha 频段（8-13Hz）的皮层其余部分表现出更强的连通性，但局部振荡 alpha 功率没有差异。刺激前的连通性指标预测了刺激后解码的准确性和与竞争解歧相关的延迟，这表明感知内容是由持续的神经网络状态塑造的。
