Why do movements drift in the dark? Passive versus active mechanisms of error accumulation.
Why do movements drift in the dark? Passive versus active mechanisms of error accumulation.
复制标题
为什么在黑暗中运动会漂移？
DOI：
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发表时间：
2015
影响因子：
2.5
通讯作者：
Joan López
中科院分区：
文献类型：
--
作者：
Brendan D. Cameron;Cristina de la Malla;Joan López
当手的视觉不可用时，运动系统地偏离其目标。然而，目前还不清楚为什么会发生这种漂移。我们调查漂移是否是一个主动的过程，在这个过程中，人们故意修改他们的动作的基础上有偏见的位置估计，导致真实的手移动远离真实的目标位置，或一个被动的过程，在这个过程中，执行错误积累，因为人们已经减少了感官反馈，并未能充分补偿执行错误。在我们的研究中，当手、目标或手和目标的视觉被遮挡时，参与者在两个目标之间来回移动。我们观察到的最漂移时，手的视觉和目标视觉被遮挡和等量的漂移时，无论是手的视觉或目标视觉被遮挡。在第二个实验中，我们观察到运动漂移，即使没有视觉目标，提供的证据表明，漂移不是由视觉本体感受的差异。在这两个实验中观察到的漂移与被动误差积累的模型一致，其中漂移量由运动误差的感官估计的精度确定。
When vision of the hand is unavailable, movements drift systematically away from their targets. It is unclear, however, why this drift occurs. We investigated whether drift is an active process, in which people deliberately modify their movements based on biased position estimates, causing the real hand to move away from the real target location, or a passive process, in which execution error accumulates because people have diminished sensory feedback and fail to adequately compensate for the execution error. In our study participants reached back and forth between two targets when vision of the hand, targets, or both the hand and targets was occluded. We observed the most drift when hand vision and target vision were occluded and equivalent amounts of drift when either hand vision or target vision was occluded. In a second experiment, we observed movement drift even when no visual target was ever present, providing evidence that drift is not driven by a visual-proprioceptive discrepancy. The observed drift in both experiments was consistent with a model of passive error accumulation in which the amount of drift is determined by the precision of the sensory estimate of movement error.
影响因子：
2.5
作者：
SOECHTING, JF;FLANDERS, M
通讯作者：
FLANDERS, M
影响因子：
2.5
作者：
SOECHTING, JF;FLANDERS, M
通讯作者：
FLANDERS, M
影响因子：
2.5
作者：
Brown, LE;Rosenbaum, DA;Sainburg, RL
通讯作者：
Sainburg, RL