Reaching with alien limbs: visual exposure to prosthetic hands in a mirror biases proprioception without accompanying illusions of ownership.
Reaching with alien limbs: visual exposure to prosthetic hands in a mirror biases proprioception without accompanying illusions of ownership.
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DOI：
10.3758/bf03208768
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发表时间：
2006-05
期刊：
影响因子：
--
通讯作者：
Spence C
中科院分区：
文献类型：
--
作者：
Holmes NP;Snijders HJ;Spence C
在五个实验中，我们研究了视觉暴露在真手、橡皮手或木块上对看不见的左手在副矢状面镜子后面所做的伸展动作的影响。参与者从四个开始位置中的一个开始伸手，对应于伸手的正确感觉和视觉指定位置之间的四个冲突级别。伸手动作受接触真手的影响最大，其次是橡皮手，最不受木块的影响。当看得见的手的姿势和/或动作与伸手的姿势和/或动作不相容时，伸手的效果就会减弱。一份名为“橡皮手错觉”的问卷显示，橡皮手的所有权错觉与触觉成绩没有很强的相关性。这项研究表明，本体感觉在视觉接触假手后重新校准，并且这种重新校准独立于橡胶手错觉。
In five experiments, we investigated the effects of visual exposure to a real hand, a rubber hand, or a wooden block on reaching movements made with the unseen left hand behind a parasagittal mirror. Participants reached from one of four starting positions, corresponding to four levels of conflict between the proprioceptively- and visually-specified position of the reaching hand. Reaching movements were affected most by exposure to the real hand, intermediately by the rubber hand, and least of all by the wooden block. When the posture and/or movement of the visible hand was incompatible with that of the reaching hand, the effect on reaching was reduced. A ‘rubber hand illusion’ questionnaire revealed that illusions of ownership of the rubber hand were not strongly correlated with reaching performance. This research suggests that proprioception recalibrates following visual exposure to prosthetic hands, and that this recalibration is independent of the rubber hand illusion.
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