Selective and delay adaptation of human saccades
Selective and delay adaptation of human saccades
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DOI：
10.1016/s0926-6410(01)00088-x
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发表时间：
2002-02-01
期刊：
影响因子：
--
通讯作者：
Aoki, M
中科院分区：
文献类型：
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作者：
Fujita, M;Amagai, A;Aoki, M
在人类受试者的第一次扫视中，持续触发目标后退引起增益的逐渐变化，即扫视振幅与目标偏心率的比值。经过几百次试验，实验对象能够在一次扫视中锁定移位的目标。移位目标的出现表明，人类的记忆引导扫视与视觉引导扫视一样具有适应性。对记忆引导扫视与其他两种视觉引导扫视之间适应性转移的研究表明，每一种扫视将10-25%的适应性增益变化转移到其他扫视中。然而，在同一水平方向上，每对视跳同时获得不同的适应增益，因此每对视跳具有独立于其他视跳的适应能力。即使在第一次扫视结束后延迟400-600毫秒出现位移目标时，也会发生适应。这些发现对研究眼动发生的适应性，特别是适应机制的位置和时间特性具有重要意义。(C) 2002 Elsevier Science B.V.版权所有
The consistently triggered step back of a target during primary saccades of a human subject induced a gradual change in gain, the ratio of the saccade amplitude to the target eccentricity. After a few hundred trials, subjects were able to foveate the displaced target in a single saccade. Presentation of a displaced target showed that human memory guided saccades have gain adaptation just like the well-established adaptation of visually guided saccades. Examining the transfer of adaptation between the memory guided saccade and two other types of visually guided saccades showed that each saccade transferred a 10-25% adapted gain change to the other saccades. However, any pair of the three saccades acquired different gains by adaptation in the same horizontal direction simultaneously, hence each saccade had adaptive capability independent of the others. Adaptation took place even when the appearance of a displaced target was delayed by 400-600 ms from the end of a primary saccade. These findings have important implications about the adaptation, particularly the location and temporal property of the adaptive mechanism in saccade generation. (C) 2002 Elsevier Science B.V. All rights reserved.