Lawrence Gavin P, Khan Michael A, Buckolz Eric, Oldham Anthony R H
Centre for Sport and Exercise Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom.
Hum Mov Sci. 2006 Jun;25(3):326-38. doi: 10.1016/j.humov.2006.02.001. Epub 2006 Apr 17.
Past research has revealed that central vision is more important than peripheral vision in controlling the amplitude of target-directed aiming movements. However, the extent to which central vision contributes to movement planning versus online control is unclear. Since participants usually fixate the target very early in the limb trajectory, the limb enters the central visual field during the late stages of movement. Hence, there may be insufficient time for central vision to be processed online to correct errors during movement execution. Instead, information from central vision may be processed offline and utilised as a form of knowledge of results, enhancing the programming of subsequent trials. In the present research, variability in limb trajectories was analysed to determine the extent to which peripheral and central vision is used to detect and correct errors during movement execution. Participants performed manual aiming movements of 450 ms under four different visual conditions: full vision, peripheral vision, central vision, no vision. The results revealed that participants utilised visual information from both the central and peripheral visual fields to adjust limb trajectories during movement execution. However, visual information from the central visual field was used more effectively to correct errors online compared to visual information from the peripheral visual field.
过去的研究表明，在控制目标导向的瞄准动作幅度方面，中央视觉比周边视觉更重要。然而，中央视觉在运动规划与在线控制中所起作用的程度尚不清楚。由于参与者通常在肢体轨迹的早期就注视目标，肢体在运动后期才进入中央视野。因此，在运动执行过程中，可能没有足够的时间对中央视觉进行在线处理以纠正错误。相反，来自中央视觉的信息可能会被离线处理，并用作结果知识的一种形式，从而增强后续试验的编程。在本研究中，分析了肢体轨迹的变异性，以确定在运动执行过程中周边视觉和中央视觉用于检测和纠正错误的程度。参与者在四种不同视觉条件下进行了450毫秒的手动瞄准动作：全视野、周边视野、中央视野、无视野。结果表明，参与者在运动执行过程中利用来自中央和周边视野的视觉信息来调整肢体轨迹。然而，与来自周边视野的视觉信息相比，来自中央视野的视觉信息在在线纠正错误方面使用得更有效。
