Hansen Steve, Tremblay Luc, Elliott Digby
Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada L8S 4K1.
Hum Mov Sci. 2008 Feb;27(1):1-11. doi: 10.1016/j.humov.2007.09.001. Epub 2008 Jan 7.
This study examined the spatial and temporal limitations of the visual corrective process in the control of upper limb movements. Real-time calculation of kinematic data was used to trigger a prismatic displacement of the movement environment during manual aiming. Using an OptoTrak motion tracking system, a data acquisition unit, and a custom-made program, perturbations were triggered at peak acceleration, peak velocity, and the estimated time of peak deceleration. Movement outcome was significantly influenced only when the visual displacement occurred at peak acceleration. The results support models of visual control that posit that early visual information is required for accurate limb control.
本研究考察了视觉矫正过程在控制上肢运动中的时空局限性。在手动瞄准过程中，利用运动学数据的实时计算来触发运动环境的棱镜位移。使用OptoTrak运动跟踪系统、数据采集单元和定制程序，在峰值加速度、峰值速度以及估计的峰值减速时间触发扰动。仅当视觉位移发生在峰值加速度时，运动结果才受到显著影响。这些结果支持了视觉控制模型，该模型认为准确的肢体控制需要早期视觉信息。
