BSC_BIDS_071724

Bodily Self-Consciousness (BSC) is the perception of bodily awareness that arises from the integration of neuronal signals in multiple sensory modalities. BSC is composed of embodiment (the perception of owning a body) and presence (the perception of being at a location). Converging lines of evidence suggest embodiment and presence are supported by different neural networks. Several models have been proposed to describe how BSC manifests from these networks, but how these networks interact is not fully understood. We propose that the perception of presence is predicated upon the perception of embodiment. Specifically, even though neural networks for presence and embodiment partially overlap, there exists a subset of brain areas that mediate the flow of information from those supporting embodiment to those supporting presence. To test this model, sensory feedback was manipulated in a virtual environment to affect BSC, while measuring behavioral performance and physiological responses in relevant brain areas. Correlated versus uncorrelated feedback was used to manipulate perceptions of embodiment. First- versus third-person perspective was used to manipulate perceptions of presence. Mean reaction times and accuracy were better with correlated feedback and first-person perspective. Functional magnetic resonance imaging (fMRI) measurements of neuronal activity identified frontoparietal and temporoparietal brain areas that appear to support embodiment and presence, respectively. We compared the effect of embodiment manipulations on presence areas and vice versa. The effect sizes for manipulations of embodiment were greater than those for manipulations of presence. This trend was also observed for brain areas that appeared to encode both embodiment and presence. This data indicates that networks associated with embodiment and presence overlap, and brain areas that support presence may depend upon the activity of those that support embodiment.

This data was converted using ezBIDS (https://brainlife.io/ezbids). Additional information regarding this dataset can be entered in this file.

## ezbids

This dataset was converted to BIDS using ezBIDS (https://brainlife.io/ezbids)

身体自我意识（Bodily Self-Consciousness, BSC）指由多感官模态的神经元信号整合所产生的身体觉知感知。身体自我意识由具身感（embodiment，即对自身拥有身体的感知）与存在感（presence，即对自身处于某一位置的感知）两部分构成。越来越多的研究证据表明，具身感与存在感分别由不同的神经网络所支撑。目前已有多项模型用于阐释身体自我意识如何通过这些神经网络产生，但这些神经网络的交互机制尚未完全明晰。
本研究提出，存在感的感知以具身感的感知为前提。具体而言，尽管支撑存在感与具身感的神经网络存在部分重叠，但存在一组脑区，介导了从支撑具身感的脑区到支撑存在感的脑区的信息流动。为验证该模型，研究人员在虚拟环境中操控感官反馈以影响身体自我意识，同时记录被试的行为表现与相关脑区的生理响应。实验中采用相关反馈与非相关反馈两组条件操控具身感感知，采用第一人称视角与第三人称视角两组条件操控存在感感知。结果显示，相关反馈与第一人称视角条件下，被试的平均反应时更短、准确率更高。
功能磁共振成像（functional magnetic resonance imaging, fMRI）的神经元活动检测结果表明，额顶叶与颞顶叶脑区分别参与支撑具身感与存在感。研究人员进一步对比了具身感操控对存在感相关脑区的影响，以及反之亦然的效应。结果发现，具身感操控的效应量大于存在感操控的效应量，这一趋势在同时编码具身感与存在感的脑区中同样存在。本数据集相关数据表明，与具身感和存在感相关的神经网络存在重叠，且支撑存在感的脑区可能依赖于支撑具身感的脑区的活动。
本数据集通过ezBIDS（https://brainlife.io/ezbids）转换生成。有关本数据集的补充信息可填写至本文件中。
## ezBIDS
本数据集通过ezBIDS（https://brainlife.io/ezbids）转换为BIDS格式。