Data from: Fractionation of parietal function in bistable perception probed with concurrent TMS-EEG

When visual input has conflicting interpretations, conscious perception can alternate spontaneously between these possible interpretations. This is called bistable perception. Previous neuroimaging studies have indicated the involvement of two right parietal areas in resolving perceptual ambiguity (ant-SPLr and post-SPLr). Transcranial magnetic stimulation (TMS) studies that selectively interfered with the normal function of these regions suggest that they play opposing roles in this type of perceptual switch. In the present study, we investigated this fractionation of parietal function by use of combined TMS with electroencephalography (EEG). Specifically, while participants viewed either a bistable stimulus, a replay stimulus, or resting-state fixation, we applied single pulse TMS to either location independently while simultaneously recording EEG. Combined with participant's individual structural magnetic resonance imaging (MRI) scans, this dataset allows for com
plex
analyses of the effect of TMS on neural time series data, which may further elucidate the causal role of the parietal cortex in ambiguous perception.

当视觉输入存在冲突性解读时，意识知觉可在这些可能的解释间自发交替，该现象被称为双稳态知觉（bistable perception）。既往神经影像学研究表明，右侧顶叶的两个区域——前侧顶叶后部（ant-SPLr）与后侧顶叶后部（post-SPLr）——参与了知觉歧义的解决过程。针对这些区域的正常功能进行选择性干预的经颅磁刺激（Transcranial Magnetic Stimulation, TMS）研究显示，二者在这类知觉转换中发挥着对立的调控作用。本研究通过将经颅磁刺激与脑电图（electroencephalography, EEG）相结合的实验范式，探究了顶叶功能的这种分化机制。具体而言，当被试分别观看双稳态刺激、重放刺激或处于静息态注视状态时，我们独立地对两个目标区域施加单脉冲经颅磁刺激，并同步记录脑电图数据。结合被试个体的结构磁共振成像（magnetic resonance imaging, MRI）扫描数据，本数据集可用于开展复杂的经颅磁刺激对神经时序数据影响的分析，从而进一步阐明顶叶皮层在知觉歧义处理中的因果性作用。