Dynamics of saccadic adaptation: Differences between athletes and nonathletes
Dynamics of saccadic adaptation: Differences between athletes and nonathletes
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DOI：
10.1097/01.opx.0000192346.84549.6a
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发表时间：
2005-12-01
影响因子：
1.4
通讯作者：
Irving, EL
中科院分区：
文献类型：
--
作者：
Jacob, R;Lillakas, L;Irving, EL
目的.本研究的目的是描述一个群体的球拍运动员和非运动员之间的扫视适应特征的差异。使用基于视频的眼动仪（ELMAR 2020）在120 Hz下记录了27名运动员（大学羽毛球和壁球运动员）和14名非运动员（每周参加休闲运动< 3小时）的眼动。负位置误差和正位置误差的反应进行了研究，在两个会议在不同的日子。负的位置误差引起的位移刺激从初始目标步（12度）向后3度。同样地，通过将刺激物向前移位3度来诱导正位置误差。在适应阶段之前、期间和之后计算试验的幅度增益。扫视适应的幅度和变化率由幅度增益确定。采用回归分析比较各组间差异。两组之间的扫视适应程度没有显著差异，无论是负（运动员-60%，非运动员-57%）和正（运动员+26%，非运动员+27%）的位置误差。球拍运动员对正位置误差的适应速度明显更快。在负位置误差的适应率方面没有观察到显著差异。球拍运动员和非运动员适应位置误差信号的数量相似。然而，球拍运动员以更快的速度对积极的位置错误做出反应，这表明战略组成部分或环境影响（如实践）可能在扫视适应中发挥作用。
Purpose. The aim of the study was to delineate differences in saccadic adaptation characteristics between a population of racquet sports athletes and nonathletes.Methods. Eye movements were recorded at 120 Hz using a video-based eye tracker (ELMAR 2020) in a sample of 27 athletes (varsity badminton and squash players) and 14 nonathletes (< 3 hours/week participation in recreational sports). Responses to negative positional error and positive positional error were studied in two sessions on separate days. Negative positional errors were induced by displacing the stimuli backwards by 3 degrees from the initial target step (12 degrees). Likewise, positive positional errors were induced by displacing the stimuli forward by 3 degrees. Amplitude gains were calculated for trials before, during, and after the adaptation phase. The magnitude and the rate of change of saccadic adaptation were determined from the amplitude gains. Differences between the groups were compared using regression analysis.Results. No significant differences were found between the two groups in the magnitude of saccadic adaptation, both for negative (athletes -60%, nonathletes -57%) and positive (athletes +26%, and nonathletes +27%) positional error. Racquet sports athletes showed a significantly faster rate of adaptation for the positive positional error. A significant difference was not observed in the rate of adaptation for the negative positional error.Conclusions. Racquet sports athletes and nonathletes adapt to positional error signals by similar amounts. However, racquet sports athletes respond to positive positional errors at a faster rate, suggesting that a strategic component or environmental influences (such as practice) may play a role in saccadic adaptation.