Otto Selz Institute for Applied Psychology, Mannheim Centre for Work and Health, University of Mannheim, 68131, Mannheim, Germany.
Exp Brain Res. 2013 Sep;229(3):383-93. doi: 10.1007/s00221-012-3374-3. Epub 2013 Jan 10.
Voluntary motor control over artificial hands has been shown to provoke a subjective incorporation of the artificial limb into body representations. However, in most studies projected or mirrored images of own hands were presented as 'artificial' body parts. Using the paradigm of the rubber hand illusion (RHI), we assessed the impact of tactile sensations and voluntary movements with respect to an unambiguously body-extraneous, artificial hand. In addition to phenomenal self-reports and pointing movements towards the own hand, we introduced a new procedure for perceptual judgements enabling the assessment of proprioceptive drift and judgement reliability regarding perceived hand location. RHI effects were comparable for tactile sensations and voluntary movements, but characteristic discrepancies were found for pointing movements. They were differently affected by the induction methods, and RHI effects were uncorrelated between both methods. These observations shed new light on inconsistent results concerning RHI effects on motor responses.
自愿控制人工手已被证明会引起对人工肢体的主观融入身体表象。然而，在大多数研究中，呈现的是自己手的投影或镜像作为“人工”身体部分。使用橡胶手错觉（RHI）范式，我们评估了触觉和自愿运动对明确的身体外的人工手的影响。除了对自身手的主观自我报告和指向运动外，我们还引入了一种新的感知判断程序，能够评估对感知到手的位置的本体感受漂移和判断可靠性。触觉和自愿运动都产生了类似的 RHI 效应，但指向运动则出现了不同的特征差异。它们受到诱导方法的不同影响，并且两种方法之间的 RHI 效应没有相关性。这些观察结果为有关 RHI 对运动反应影响的不一致结果提供了新的视角。
