Towards a digital body: the virtual arm illusion.

Towards a digital body: the virtual arm illusion.
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DOI:
10.3389/neuro.09.006.2008
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发表时间:
2008
影响因子:
2.9
通讯作者:
Sanchez-Vives MV
Sanchez-Vives MV
中科院分区:
医学3区
文献类型:
--
作者:
Slater M;Perez-Marcos D;Ehrsson HH;Sanchez-Vives MV

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人脑与计算机的整合是应用神经科学的一个有趣的新领域,其中一个应用是用虚拟的表现代替人的真实身体。在这里,我们证明,如果提供适当的多感官关联,虚拟肢体可以成为你身体的一部分。我们报告了一种错觉,通过对一个人隐藏的真实右手的触觉刺激和同步的虚拟视觉刺激,在一个对齐的3D立体虚拟手臂上水平伸出他们的肩膀。在一项有21名男性参与者参与的实验中,问卷调查结果和本体感觉漂移显示了虚拟手的所有权转移。另一组20名没有经历过这种错觉的男性进行了异步敲击的对照实验。刺激5分钟后,虚拟手臂旋转。有证据表明,错觉的程度也与右臂肌肉活动的程度有关,这是通过肌电图测量的,在同步而非异步条件下,手臂在旋转。因此,一个完全虚拟的物体可以作为一个人自我的一部分来体验,这开启了在未来的虚拟现实应用或在线游戏中,整个虚拟身体可以被感觉为自己的可能性,并且是理解身体所有权背后的大脑机制的宝贵工具。
The integration of the human brain with computers is an interesting new area of applied neuroscience, where one application is replacement of a person's real body by a virtual representation. Here we demonstrate that a virtual limb can be made to feel part of your body if appropriate multisensory correlations are provided. We report an illusion that is invoked through tactile stimulation on a person's hidden real right hand with synchronous virtual visual stimulation on an aligned 3D stereo virtual arm projecting horizontally out of their shoulder. An experiment with 21 male participants showed displacement of ownership towards the virtual hand, as illustrated by questionnaire responses and proprioceptive drift. A control experiment with asynchronous tapping was carried out with a different set of 20 male participants who did not experience the illusion. After 5 min of stimulation the virtual arm rotated. Evidence suggests that the extent of the illusion was also correlated with the degree of muscle activity onset in the right arm as measured by EMG during this period that the arm was rotating, for the synchronous but not the asynchronous condition. A completely virtual object can therefore be experienced as part of one's self, which opens up the possibility that an entire virtual body could be felt as one's own in future virtual reality applications or online games, and be an invaluable tool for the understanding of the brain mechanisms underlying body ownership.
DOI: 10.1093/ptj/67.1.43
发表时间: 1987-01-01
期刊: PHYSICAL THERAPY
影响因子: 3.2
作者:
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通讯作者: DIFABIO, RP
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DOI: 10.1523/jneurosci.0800-05.2005
发表时间: 2005-11-09
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子: --
作者:
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发表时间: 2006-08-01
影响因子: --
作者:
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DOI: 10.1126/science.1142175
发表时间: 2007-08-24
期刊: SCIENCE
影响因子: 56.9
作者:
Ehrsson, H. Henrik
通讯作者: Ehrsson, H. Henrik
DOI: 10.1037/0096-1523.31.1.80
发表时间: 2005-02-01
影响因子: 2.1
作者:
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通讯作者: Haggard, P