a Macquarie Centre for Cognitive Science, Institute of Human Cognition and Brain Science , Macquarie University , Sydney , Australia.
Cogn Neurosci. 2011 Sep-Dec;2(3-4):147-54. doi: 10.1080/17588928.2011.578208. Epub 2011 Jun 3.
To some extent the bodies of others and one's own body are represented differently in the human brain. This study investigates how these different body representations are used during tactile perception. Two types of cues--purely visual cues (pictures of hands) and multisensory cues (equivalent to the rubber hand illusion paradigm)--were used to control whether a seen hand was one's own hand or somebody else's hand. We found that viewing one's own hand improves nonspatial tactile discrimination of supra-threshold stimuli, but attenuates tactile detection performance. Furthermore, when multisensory information signals that the viewed hand is not one's own hand, tactile nonspatial performance seems to be generally sensitized as compared to not viewing a hand. Such body-ownership-specific modulations were present only when multisensory cues signaled body ownership.
在某种程度上，他人的身体和自己的身体在人类大脑中被不同地呈现。本研究调查了在触觉感知过程中这些不同的身体表征是如何被使用的。两种类型的线索——纯粹的视觉线索（手的图片）和多感觉线索（等同于橡胶手错觉范式）——被用来控制所看到的手是自己的手还是别人的手。我们发现，观看自己的手可以提高超阈值刺激的非空间触觉辨别能力，但会降低触觉检测性能。此外，当多感觉信息表明所看到的手不是自己的手时，与不看手相比，触觉非空间性能似乎普遍变得敏感。只有当多感觉线索提示身体所有权时，才会出现这种特定于身体所有权的调制。
