The absence or temporal offset of visual feedback does not influence adaptation to novel movement dynamics.
The absence or temporal offset of visual feedback does not influence adaptation to novel movement dynamics.
复制标题
视觉反馈的缺失或时间偏移不会影响对新运动动态的适应。
DOI：
10.1152/jn.00636.2016
复制
发表时间：
2017
影响因子：
2.5
通讯作者：
Joiner,WilsaanM
中科院分区：
文献类型：
--
作者：
McKenna,Erin;Bray,LaurenceCJayet;Zhou,Weiwei;Joiner,WilsaanM
传输和处理感觉信息的延迟需要正确地将延迟的反馈与发出的运动命令相关联，以实现准确的误差补偿。运动信号和反馈之间的这种对准的灵活性已经被证明用于将运动重新校准到视觉操作，但对于适应运动动力学的对准依赖在很大程度上是未知的。在这里，我们考察了视觉反馈操作对力场适应的影响。三个受试组在经历相应光标运动的滞后(0、75或150毫秒)时使用操纵键。当在会议开始时应用补偿(连续条件)时，不同组之间的适应没有显著差异。然而，这些相似之处可能是由于在运动适应之前对偏移量的适应。我们测试了其他受试者，这些受试者在引入扰动(突然情况)的同时经历了相同的延迟。在这种情况下，适应与持续状态在统计上没有区别，表明对反馈延迟的适应不是一个因素。此外，终点误差在延迟或起搏条件下没有显著差异，但终点校正(例如，减速持续时间)受到时间偏差的影响。作为额外的对照，我们测试了一组没有视觉反馈的受试者，发现了类似的运动适应结果。这些结果表明，视觉反馈操作(缺失或时间错位)不影响对新动态的适应，独立于适应和知觉。这些发现可能对建模运动系统如何在感觉反馈信息同时延迟的情况下适应错误具有启示。NEW&NOTEWORTHY运动和扭曲的视觉反馈之间的时间偏差(例如，视觉运动旋转)会影响随后的运动重新校准，但这种偏差对改变的运动动力学的影响在很大程度上是未知的。在这里，我们考察了1)延迟和2)移除视觉反馈对适应新的运动动力学的影响。这些结果有助于理解当运动状态和感觉信息之间存在时间分离时补偿运动误差的控制策略。
Delays in transmitting and processing sensory information require correctly associating delayed feedback to issued motor commands for accurate error compensation. The flexibility of this alignment between motor signals and feedback has been demonstrated for movement recalibration to visual manipulations, but the alignment dependence for adapting movement dynamics is largely unknown. Here we examined the effect of visual feedback manipulations on force-field adaptation. Three subject groups used a manipulandum while experiencing a lag in the corresponding cursor motion (0, 75, or 150 ms). When the offset was applied at the start of the session (continuous condition), adaptation was not significantly different between groups. However, these similarities may be due to acclimation to the offset before motor adaptation. We tested additional subjects who experienced the same delays concurrent with the introduction of the perturbation (abrupt condition). In this case adaptation was statistically indistinguishable from the continuous condition, indicating that acclimation to feedback delay was not a factor. In addition, end-point errors were not significantly different across the delay or onset conditions, but end-point correction (e.g., deceleration duration) was influenced by the temporal offset. As an additional control, we tested a group of subjects who performed without visual feedback and found comparable movement adaptation results. These results suggest that visual feedback manipulation (absence or temporal misalignment) does not affect adaptation to novel dynamics, independent of both acclimation and perceptual awareness. These findings could have implications for modeling how the motor system adjusts to errors despite concurrent delays in sensory feedback information.NEW & NOTEWORTHYA temporal offset between movement and distorted visual feedback (e.g., visuomotor rotation) influences the subsequent motor recalibration, but the effects of this offset for altered movement dynamics are largely unknown. Here we examined the influence of1) delayed and2) removed visual feedback on the adaptation to novel movement dynamics. These results contribute to understanding of the control strategies that compensate for movement errors when there is a temporal separation between motion state and sensory information.