The relationship between virtual body ownership and temperature sensitivity
The relationship between virtual body ownership and temperature sensitivity
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DOI：
10.1098/rsif.2013.0300
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发表时间：
2013-08-06
影响因子：
3.9
通讯作者：
Slater, Mel
中科院分区：
文献类型：
--
作者：
Llobera, Joan;Sanchez-Vives, M. V.;Slater, Mel
在橡胶手错觉中，橡胶手上看到的触觉刺激与隐藏的真实手上感受到的触觉刺激同步，可以导致对橡胶手的所有权的错觉。这种错觉已被证明会导致隐藏的手的温度下降，这表明这种虚幻的所有权会导致真实的手失去所有权。在这里，我们应用沉浸式虚拟现实（VR）来实验研究对温度变化的敏感性。四十名参与者体验了从第一人称视角看到的虚拟身体 (VB) 的 VR 沉浸感。对于一半的参与者来说，VB 的姿势和动作与自己的身体一致，而另一半则不一致。在虚拟体验之前和期间测量了手掌的温度敏感性。结果表明，与不一致条件相比，一致条件下的温度敏感性有所下降。此外，敏感性的变化与虚拟手臂所有权的主观幻觉显着相关，但受到对完整虚拟手臂所有权的幻觉的调节。这表明，全身所有权幻觉导致虚拟身体和真实身体统一为一个整体实体——真实身体上的本体感觉和触觉与虚拟身体的视觉存在相结合。结果在最近引入文献的“身体矩阵”框架中进行了解释。
In the rubber hand illusion, tactile stimulation seen on a rubber hand, that is synchronous with tactile stimulation felt on the hidden real hand, can lead to an illusion of ownership over the rubber hand. This illusion has been shown to produce a temperature decrease in the hidden hand, suggesting that such illusory ownership produces disownership of the real hand. Here, we apply immersive virtual reality (VR) to experimentally investigate this with respect to sensitivity to temperature change. Forty participants experienced immersion in a VR with a virtual body (VB) seen from a first-person perspective. For half the participants, the VB was consistent in posture and movement with their own body, and in the other half, there was inconsistency. Temperature sensitivity on the palm of the hand was measured before and during the virtual experience. The results show that temperature sensitivity decreased in the consistent compared with the inconsistent condition. Moreover, the change in sensitivity was significantly correlated with the subjective illusion of virtual arm ownership but modulated by the illusion of ownership over the full VB. This suggests that a full body ownership illusion results in a unification of the virtual and real bodies into one overall entity-with proprioception and tactile sensations on the real body integrated with the visual presence of the VB. The results are interpreted in the framework of a 'body matrix' recently introduced into the literature.