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首页> 美国卫生研究院文献>Scientific Reports >Cardio-visual full body illusion alters bodily self-consciousness and tactile processing in somatosensory cortex
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Cardio-visual full body illusion alters bodily self-consciousness and tactile processing in somatosensory cortex

机译：全身视觉错觉改变体感皮质的身体自我意识和触觉加工

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Prominent theories highlight the importance of bodily perception for self-consciousness, but it is currently not known whether this is based on interoceptive or exteroceptive signals or on integrated signals from these anatomically distinct systems, nor where in the brain such integration might occur. To investigate this, we measured brain activity during the recently described ‘cardio-visual full body illusion’ which combines interoceptive and exteroceptive signals, by providing participants with visual exteroceptive information about their heartbeat in the form of a periodically illuminated silhouette outlining a video image of the participant’s body and flashing in synchrony with their heartbeat. We found, as also reported previously, that synchronous cardio-visual signals increased self-identification with the virtual body. Here we further investigated whether experimental changes in self-consciousness during this illusion are accompanied by activity changes in somatosensory cortex by recording somatosensory evoked potentials (SEPs). We show that a late somatosensory evoked potential component (P45) reflects the illusory self-identification with a virtual body. These data demonstrate that interoceptive and exteroceptive signals can be combined to modulate activity in parietal somatosensory cortex.
机译：突出的理论突出了身体知觉对自我意识的重要性，但目前尚不知道这是基于感受性或外部感受性信号还是基于这些解剖学上不同的系统的整合信号，还是在大脑中的何处发生这种整合。为了对此进行调查，我们在最近描述的“心-视全身错觉”中测量了大脑的活动，该幻觉结合了感知和感知信号，通过以周期性照亮的轮廓的形式向参与者提供有关其心跳的视觉感知信息，概述了视频的影像。参与者的身体并与他们的心跳同步闪烁。我们也发现，正如先前所报道的，同步的心电信号增加了对虚拟身体的自我识别。在这里，我们通过记录体感诱发电位（SEPs），进一步研究了这种幻觉中自我意识的实验变化是否伴随着体感皮层活动的变化。我们显示，后期的体感诱发电位组件（P45）反映了虚拟身体的虚幻自我识别。这些数据表明，可以将感知内和感知外的信号结合起来，以调节顶体体感皮层的活动。

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