Speed and accuracy of saccadic eye movements: characteristics of impulse variability in the oculomotor system.
Speed and accuracy of saccadic eye movements: characteristics of impulse variability in the oculomotor system.
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DOI：
10.1037//0096-1523.15.3.529
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发表时间：
1989-08
期刊：
影响因子：
--
通讯作者：
R. Abrams;D. Meyer;S. Kornblum
中科院分区：
文献类型：
--
作者：
R. Abrams;D. Meyer;S. Kornblum
在扫视眼球运动的轨迹中观察到的动态特性揭示了用于移动眼睛的力脉冲的系统可变性。这种可变性导致扫视表现出线性速度-准确性权衡：随着朝向指定目标点的扫视的平均距离和持续时间增加，扫视运动端点的标准差随着扫视的平均速度线性增加。线性权衡，和其他观察到的随机性质的扫视，可以归因于噪声在神经运动过程中，并可以描述的脉冲变异性模型，最初设计用于表征肢体运动。根据该模型，眼睛和肢体的运动都是通过随机力和时间参数来控制的，这些参数决定了运动的运动学。这样一个帐户可能会促进一个统一的概念框架，了解广泛的运动行为。
Dynamic characteristics observed in the trajectories of saccadic eye movements reveal systematic variability of the force pulses used to move the eyes. This variability causes saccades to exhibit a linear speed-accuracy trade-off: As the average distance and duration of saccades toward specified target points increase, the standard deviations of saccadic-movement endpoints increase linearly with the saccades' average velocity. The linear trade-off, and other observed stochastic properties of saccades, may be attributed to noise in neuromotor processes and may be described in terms of an impulse-variability model originally designed for characterizing limb movements. According to the model, both eye and limb movements are controlled through stochastic force and time parameters that govern movement kinematics. Such an account may promote a unified conceptual framework for understanding a wide range of motor behavior.