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首页> 外文期刊>Journal of vision >Accurate planning of manual tracking requires a 3D visuomotor transformation of velocity signals
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Accurate planning of manual tracking requires a 3D visuomotor transformation of velocity signals

机译：手动跟踪的准确计划需要速度信号的3D视觉运动转换

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AbstractAbstract: Abstract?? Humansoften perform visually guided arm movements in a dynamic environment. To accurately plan visually guided manual tracking movements, the brain should ideally transform the retinal velocity input into a spatially appropriate motor plan, taking the three-dimensional (3D) eye-head-shoulder geometry into account. Indeed, retinal and spatial target velocity vectors generally do not align because of different eye-head postures. Alternatively, the planning could be crude (based only on retinal information) and the movement corrected online using visual feedback. This study aims to investigate how accurate the motor plan generated by the central nervous system is. We computed predictions about the movement plan if the eye and head position are taken into account (spatial hypothesis) or not (retinal hypothesis). For the motor plan to be accurate, the brain should compensate for the head roll and resulting ocular counterroll as well as the misalignment between retinal and spatial coordinates when the eyes lie in oblique gaze positions. Predictions were tested on human subjects who manually tracked moving targets in darkness and were compared to the initial arm direction, reflecting the motor plan. Subjects spatially accurately tracked the target, although imperfectly. Therefore, the brain takes the 3D eye-head-shoulder geometry into account for the planning of visually guided manual tracking.
机译：摘要摘要：摘要？ Humansoften在动态环境中执行视觉引导的手臂运动。为了准确地计划视觉引导的手动跟踪运动，大脑应该理想地将视网膜速度输入转换为在空间上适当的运动计划，同时考虑到三维（3D）眼-头-肩几何形状。实际上，由于眼头姿势的不同，视网膜和空间目标速度矢量通常不对齐。另外，计划可能是粗略的（仅基于视网膜信息），并使用视觉反馈在线校正运动。这项研究旨在调查由中枢神经系统产生的运动计划的准确性。无论是否考虑（空间假设）（视网膜假设），我们都计算了有关运动计划的预测。为了使运动计划更加准确，当眼睛处于斜视位置时，大脑应补偿头侧倾和随之产生的眼部反冲以及视网膜和空间坐标之间的不对齐。对在黑暗中手动跟踪运动目标的人类受试者进行了预测测试，并将其与初始手臂方向进行比较，以反映运动计划。受试者在空间上准确地跟踪了目标，尽管并不完美。因此，大脑在计划视觉引导的手动跟踪时会考虑3D眼-头-肩的几何形状。

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