The continuous pointing task uses target-directed pointing responses to determine how perceived distance traveled is estimated during forward linear walking movements. To more precisely examine the regulation of this online process, the current study measured upper extremity joint angles and step-cycle kinematics in full vision and no-vision continuous pointing movements. Results show perceptual under-estimation of traveled distance in no-vision trials compared to full vision trials. Additionally, parsing of the shoulder plane of elevation trajectories revealed discontinuities that reflected this perceptual under-estimation and that were most frequently coupled with the early portion of the right foot swing phase of the step-cycle. This suggests that spatial updating may be composed of discrete iterations that are associated with gait parameters.

中文翻译：

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使用连续指向任务揭示了向前线性行走过程中的迭代空间更新。

连续指向任务使用目标指向的指向响应来确定在向前线性步行运动期间如何估计感知的行进距离。为了更精确地检查此在线过程的规则，当前的研究在全视力和无视连续指向运动中测量了上肢关节角度和步进运动学。结果表明，与全视力试验相比，无视力试验对行进距离的感知低估。此外，对高程轨迹的肩平面的解析显示出不连续性，这反映了这种感知上的低估，并且最频繁地与阶跃循环的右脚挥杆阶段的早期相结合。这表明空间更新可能由与步态参数相关的离散迭代组成。