Brodie Eric E, Whyte Anne, Waller Bridget
Department of Psychology, Glasgow Caledonian University, G4 0BA, Glasgow, UK.
Neurosci Lett. 2003 May 1;341(2):167-9. doi: 10.1016/s0304-3940(03)00160-5.
Although previous research reported that the visual feedback of a 'virtual arm' increased the control of a phantom arm, it did not consider that the repeated attempt to move the phantom may have contributed to the effect. Twenty-one lower limb amputees reported the response of their phantom leg during repeated attempts to move both legs in one of two conditions, a control condition in which the amputee only viewed the movements of their intact leg and an experimental condition in which the amputee additionally viewed the movements of a 'virtual' leg. It was found that viewing a virtual leg resulted in amputees reporting a significantly greater number of movements of their phantom leg than with attempted movement alone. The implications were discussed in terms of visuo-motor adaptation and theories of motor control.
尽管先前的研究报告称，“虚拟手臂”的视觉反馈增强了对幻肢的控制，但该研究没有考虑到反复尝试移动幻肢可能对这种效果起到了促进作用。21名下肢截肢者报告了在两种条件下反复尝试双腿移动时他们幻肢的反应，一种是对照条件，即截肢者仅观察其完好腿部的运动；另一种是实验条件，即截肢者额外观察一条“虚拟”腿的运动。结果发现，与仅进行尝试性移动相比，观察虚拟腿使截肢者报告的幻腿运动次数显著增多。研究从视觉运动适应和运动控制理论方面对这些结果进行了讨论。
