Roles of the right temporo-parietal and premotor cortices in self-location and body ownership
Roles of the right temporo-parietal and premotor cortices in self-location and body ownership
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DOI：
10.1111/ejn.13937
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发表时间：
2018-06-01
影响因子：
3.4
通讯作者：
Bolognini, Nadia
中科院分区：
文献类型：
--
作者：
Convento, Silvia;Romano, Daniele;Bolognini, Nadia
在橡胶手错觉（RHI）中，假手属于自己的感觉可以通过假的可见手和自己隐藏的手同时、一致的触摸来诱导。这种情况还与真实的手的感知位置的重新校准相关联。一个皮层网络，包括运动前区和颞顶叶区，已被提出作为RHI的基础。然而，这些领域的因果关系的贡献离散虚幻的组件仍然不清楚。我们使用经颅直流电刺激（tDCS），以评估右前运动皮层（rPMc）和右颞顶叶交界处（rTPJ）的RHI的贡献，并探讨这些领域的作用，在调制的主观经验的体现和手的位置的错觉。我们发现rPMc和rTPJ的阳极tDCS增加了对假手的真实的手位置的误判。至关重要的是，当tDCS应用于rPMc时，一致和不一致的视觉-触觉抚摸引起的本体感觉位移的差异最小化，而当rTPJ被靶向时，它被放大。tDCS的顶叶效应也延伸到RHI的自我报告部分。这些研究结果表明，tDCS的rTPJ调制的RHI视触觉刺激的时间一致性的依赖，而tDCS的rPMc诱导一般重新校准的手坐标，无论视觉触觉一致性。目前的结果进行了讨论的RHI的多组分模型的视图。
In the rubber hand illusion (RHI), the feeling that a fake hand belongs to oneself can be induced by the simultaneous, congruent touch of the fake visible hand and one's own hidden hand. This condition is also associated with a recalibration of the perceived location of the real hand. A cortical network, including premotor and temporo-parietal areas, has been proposed as the basis of the RHI. However, the causal contribution of these areas to the discrete illusory components remains unclear. We used transcranial direct current stimulation (tDCS) to assess the contribution of the right premotor cortex (rPMc) and the right temporo-parietal junction (rTPJ) to the RHI and explored the role of these areas in modulating the subjective experience of embodiment and the misperception of the hand position. We found that anodal tDCS of both rPMc and rTPJ increased the misjudgement of the real hand location towards the fake hand. Crucially, the difference in proprioceptive displacement evoked by the congruent and incongruent visuo-tactile stroking was minimised when tDCS was applied over the rPMc, while it was amplified when the rTPJ was targeted. The parietal effects of tDCS also extended to the self-report components of the RHI. These findings suggest that the tDCS of rTPJ modulates the RHI depending on the temporal congruency of the visuo-tactile stimulation, while the tDCS of rPMc induces a general recalibration of hand coordinates, regardless of the visuo-tactile congruency. The present results are discussed in the view of a multicomponent model of the RHI.