Touching a rubber hand: feeling of body ownership is associated with activity in multisensory brain areas.
Touching a rubber hand: feeling of body ownership is associated with activity in multisensory brain areas.
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触摸橡胶手：身体所有权的感觉与多感官大脑区域的活动有关。
DOI：
10.1523/jneurosci.0800-05.2005
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发表时间：
2005-11-09
期刊：
影响因子：
--
通讯作者：
Passingham RE
中科院分区：
文献类型：
--
作者：
Ehrsson HH;Holmes NP;Passingham RE
在“橡胶手错觉”中，在刷自己隐藏的手的同时刷橡胶手的景象足以产生拥有假手的感觉。我们之前已经证明，这种错觉与多感觉区域的活动有关，最明显的是腹侧前运动皮层。然而，这仍然有待证明，这种错觉并不简单地反映了视觉的主导作用，运动前活动并不反映了一个物体的视觉表征附近的手。为了解决这些问题，我们引入了一个躯体的“橡胶手错觉”。实验者移动被蒙上眼睛的参与者的左手食指，使其触摸假手，同时，他触摸参与者的真实的右手，尽可能完美地同步触摸。大约9.7秒后，这种刺激引起了一种错觉，即一个人正在触摸自己的手。我们使用功能性磁共振成像扫描了在这种错觉和两种控制条件下的大脑活动。腹侧前运动皮层、顶内皮层和小脑的活动与触摸自己的手的错觉有关。此外，错觉的额定强度与运动前区和小脑活动的程度相关。这一发现表明，这些区域的活动反映了对来自自身身体的一致多感官信号的检测，而不是视觉表征。我们认为，这可能是身体所有权感的机制。
In the ‘rubber hand illusion’, the sight of brushing of a rubber hand at the same time as brushing of the person’s own hidden hand is sufficient to produce a feeling of ownership of the fake hand. We have previously shown that this illusion is associated with activity in the multisensory areas, most notably the ventral premotor cortex. However, it remains to be demonstrated that this illusion does not simply reflect the dominant role of vision, and that the premotor activity does not reflect a visual representation of an object near the hand. To address these issues we introduce a somatic ‘rubber hand illusion’. The experimenter moved the blindfolded participants’ left index finger so that it touched the fake hand, and simultaneously, he touched the participants’ real right hand synchronizing the touches as perfectly as possible. After about 9.7 seconds this stimulation elicited an illusion that one was touching one’s own hand. We scanned brain activity during this illusion and two control conditions, using functional magnetic resonance imaging. Activity in the ventral premotor cortices, intraparietal cortices, and the cerebellum was associated with the illusion of touching one’s own hand. Furthermore, the rated strength of the illusion correlated with the degree of premotor and cerebellar activity. This finding suggests that the activity in these areas reflects the detection of congruent multisensory signals from one’s own body, rather than of visual representations. We propose that this could be the mechanism for the feeling of body ownership.