Nested task constraints shape continuous perception–action coupling control during human locomotor pointing
Nested task constraints shape continuous perception–action coupling control during human locomotor pointing
复制标题
嵌套任务约束塑造人类运动指向过程中的连续感知-动作耦合控制
DOI：
10.1016/j.neulet.2004.05.095
复制
发表时间：
2004
影响因子：
2.5
通讯作者：
K. Davids
中科院分区：
文献类型：
--
作者：
I. Renshaw;K. Davids
人类运动指向的行为研究一直占主导地位的特定任务的限制，产生最大的接近速度对空间目标。要检查运动指向不同的嵌套任务的限制，在次最大的接近速度和伴随的差异，在速度-准确性的权衡，运行的专业板球保龄球手（n = 6）进行了分析。步长调整的试验间和试验内分析揭示了当前和所需的运动指向行为之间的差异如何限制步态的视觉适应。结果支持一个连续的感知-动作耦合控制机制，虽然没有观察到的顺序和调整总量的步骤数之间的关系，这意味着视觉适应并没有持续到运行结束后，一旦启动。相反，投球手在整个助跑过程中进行了步骤调整，调整的数量和需要的数量有很强的关联。在不同的时间点的运行中，在个体间的策略，使大多数调整观察到显着的变化。前瞻性的运动指向控制模型的一个关键前提被认为是强大的，因为板球运动员的步态调节是连续的，并根据当前的感知和所需的行为。研究结果扩展了对嵌套任务约束的性质和范围的理解，在这些约束下，感知-动作耦合控制运动指向性能。
Behavioural studies of human locomotor pointing have been dominated by specific task constraints of generating maximal approach velocity towards spatial targets. To examine locomotor pointing under different nested task constraints, at sub-maximal approach velocities and with concomitant differences in speed-accuracy trade offs, run-ups of professional cricket bowlers (n = 6) were analysed. Inter- and intra-trial analyses of step length adjustments revealed how differences between current and required locomotor pointing behaviour constrained visual adaptations of gait. Results supported a continuous perception–action coupling control mechanism, although no relationship was observed between step number in sequence and total amount of adjustment made, implying that visual adaptations did not continue to the end of a run-up once initiated. Rather, bowlers made step adjustments throughout the run-up, with strong associations for amount of adjustment made and amount needed. Significant variations were observed in inter-individual strategies for making most adjustments at different points of the run-up. A key premise of prospective control models of locomotor pointing was found to be robust, since regulation of cricketer’s gait was continuous and based on perception of current and required behaviour. Findings extend understanding of the nature and range of nested task constraints under which perception–action coupling controls locomotor pointing performance.