Mechanisms of short-term saccadic adaptation.
Mechanisms of short-term saccadic adaptation.
复制标题
短期扫视适应机制。
DOI：
10.1037//0096-1523.15.2.249
复制
发表时间：
1989
期刊：
影响因子：
--
通讯作者：
J. Vercher
中科院分区：
文献类型：
--
作者：
John L. Semmlow;G. Gauthier;J. Vercher
已经识别了自适应地修改眼动控制组件的许多过程。这里研究的自适应过程可以可靠地产生在短时间内由视觉刺激，迫使postsaccadic错误。这种短期的适应性过程，通常称为参数适应，包括在50到100个训练刺激中逐渐发展的反应幅度的变化。所得到的补偿与由训练刺激引起的误差成比例，但基本上小于由训练刺激引起的误差。反应幅度的增加和减少都可以通过刺激目标的适当定时和定向运动来诱发，这迫使眼扫视后错误。结果表明，一个单一类型的训练刺激可以影响运动在一个广泛的空间区域，提供这些运动是在同一方向的训练刺激。映射修改范围的实验表明，增加的自适应修改通过重新映射最终位置来操作，而减少的自适应修改通过整体降低增益来实现。训练刺激，试图唤起增加和减少在同一地区显示出一个净修改相当于个人适应过程的代数加法。
A number of processes have been identified that adaptively modify oculomotor control components. The adaptive process studied here can be reliably produced over a short period of time by a visual stimulus that forces postsaccadic error. This short-term adaptive process, usually termed parametric adaptation, consists of a change in response amplitude that develops progressively over 50 to 100 training stimuli. The resulting compensation is proportional to, but substantially less than, the error induced by the training stimuli. Both increases and decreases in response amplitude can be evoked by an appropriately timed and directed movement of the stimulus target, which forces postsaccadic error. Results show that a single type of training stimulus can influence movements over a broad spatial region, provided these movements are in the same direction as the training stimulus. Experiments that map the range of modification suggest that the increasing adaptive modification operates by remapping final position, whereas the decreasing adaptive modification is achieved through an overall reduction of gain. Training stimuli that attempt to evoke both increases and decreases in the same region show a net modification equivalent to the algebraic addition of individual adaptive processes.