Redding G M, Wallace B
a Illinois State University.
b Cleveland State University.
J Mot Behav. 1997 Jun;29(2):119-30. doi: 10.1080/00222899709600827.
The performance of subjects whose starting limb location was visible when pointing to a sagittal target during exposure to prismatic displacement showed immediate target acquisition, but aftereffects of exposure were absent. When starting limb location was not visible, accurate exposure performance was slow to develop, but aftereffects were substantial. Visible starting location evoked a zeroing-in control strategy on the basis of relative-location coding, which rapidly reduced performance error but disabled detection of spatial misalignment between sensorimotor systems. When starting location was not visible, absolute-location coding of the displaced target initiated movement that had to be corrected subsequently by visual feedback. In this case, comparison of the initial erroneous movement code with the limb location that achieved the target enabled misalignment detection and consequent realignment.
在棱镜位移暴露期间指向矢状目标时，起始肢体位置可见的受试者的表现显示出即时的目标获取，但没有暴露后效应。当起始肢体位置不可见时，准确的暴露表现发展缓慢，但后效应显著。可见的起始位置基于相对位置编码引发了一种归零控制策略，该策略迅速减少了表现误差，但无法检测感觉运动系统之间的空间错位。当起始位置不可见时，位移目标的绝对位置编码启动运动，随后必须通过视觉反馈进行校正。在这种情况下，将初始错误运动编码与实现目标的肢体位置进行比较，能够检测到错位并随之进行重新校准。
