Melcher David
Center for Mind/Brain Studies and Department of Cognitive Science, University of Trento, Corso Bettini 31, Rovereto 38068, Italy.
Nat Neurosci. 2007 Jul;10(7):903-7. doi: 10.1038/nn1917. Epub 2007 Jun 24.
The frequent occurrence of saccadic eye movements raises the question of how information is combined across separate glances into a stable, continuous percept. Here I show that visual form processing is altered at both the current fixation position and the location of the saccadic target before the saccade. When human observers prepared to follow a displacement of the stimulus with the eyes, visual form adaptation was transferred from current fixation to the future gaze position. This transfer of adaptation also influenced the perception of test stimuli shown at an intermediate position between fixation and saccadic target. Additionally, I found a presaccadic transfer of adaptation when observers prepared to move their eyes toward a stationary adapting stimulus in peripheral vision. The remapping of visual processing, demonstrated here with form adaptation, may help to explain our impression of a smooth transition, with no temporal delay, of visual perception across glances.
眼球快速跳动的频繁发生引发了一个问题，即信息是如何在不同的扫视中整合为一个稳定、连续的感知的。在这里，我表明在扫视之前，视觉形式处理在当前注视位置和扫视目标位置都会发生改变。当人类观察者准备用眼睛跟随刺激的位移时，视觉形式适应会从当前注视转移到未来的注视位置。这种适应的转移也影响了在注视和扫视目标之间的中间位置呈现的测试刺激的感知。此外，我发现当观察者准备将眼睛移向周边视觉中的静止适应刺激时，存在扫视前的适应转移。这里通过形式适应证明的视觉处理重映射，可能有助于解释我们对视觉感知在扫视间平稳过渡且无时间延迟的印象。
