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The influence of time constraints on posture choices during an end-state comfort task

机译：时间限制对终端舒适任务期间姿势选择的影响

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People adopt comfortable postures for the end states of motor actions (end-state comfort; Rosenbaum & Jorgensen, 1992). The choice to end comfortably often elicits adoption of uncomfortable beginning states, demonstrating that a sequence of movement is planned in advance of movement onset. Many factors influence the choice of comfortable end-state postures including the greater precision and speed afforded by postures at joint angle mid-ranges (Short & Cauraugh, 1999). To date, there has been little evaluation of the hypothesis that postures are chosen based on minimizing the time spent in uncomfortable postures. The aim of this experiment was to examine how the relative time required to hold beginning and end-state postures influenced the choice of posture. Participants moved a two-toned wooden dowel from one location to another with the requirement to grasp the object and place a specified color down. Participants completed four conditions where no postures were held, only one posture was held, or both postures were held. We predicted more thumb-up postures for positions held longer regardless of whether these postures were at the end or beginning state. Results verified that the constraint of holding the initial posture led to decreased end-state comfort supporting the hypothesis that estimation of time spent in postures is an important constraint in planning. We also note marked individual differences in posture choices, particularly when the object was moved to the left.
机译：人们采用舒适的电机行动态度姿势（最终状态舒适; Rosenbaum＆Jorgensen，1992）。选择结束舒适地经常引发采用不舒服的开始状态，表明在运动开始之前计划了一系列运动。许多因素影响了舒适的最终状态姿势的选择，包括联合角中范围内姿势的更高的精度和速度（短和Cauraugh，1999）。迄今为止，对假设的评估很少，这是基于最小化在不舒服姿势所花费的时间的姿势。该实验的目的是检查如何持有开始和终端状态姿势所需的相对时间影响姿势的选择。参与者将一个两个定调的木制销钉从一个位置移动到另一个位置，要求掌握物体并放下指定的颜色。参与者完成了四个条件，没有举行姿势，只持有一个姿势，或者持有两种姿势。我们预测了更多拇指向上姿势，无论这些姿势是否在最终或开始状态。结果证实，保持初始姿势的约束导致最终状态的舒适度，支持姿势所花费的时间的假设是规划中的一个重要限制。我们还注意到姿势选择的特性差异，特别是当物体移动到左侧时。

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