Microsaccades precisely relocate gaze in a high visual acuity task.

Microsaccades precisely relocate gaze in a high visual acuity task.
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DOI:
10.1038/nn.2663
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发表时间:
2010-12
影响因子:
25
通讯作者:
Rucci, Michele
Rucci, Michele
中科院分区:
医学1区
文献类型:
--
作者:
Ko, Hee-kyoung;Poletti, Martina;Rucci, Michele

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视网膜上的图像永远不是静止的。即使在稳定的注视过程中,也会发生凝视的微观移位,称为微扫视。长期以来,人们一直认为微扫视能够以与扫视通常用于扫描较大区域相同的方式探索场景中的小区域。然而,这一假设仍然存在争议,因为人们认为,微扫视在精细的空间判断过程中受到抑制。我们研究了人类观察者在高敏锐度视觉任务中的眼球运动,即在计算机模拟的虚拟环境中穿针。使用一种方法的凝视特遣队显示,使视线的准确定位,我们发现,微跳视精确地移动眼睛附近的区域的兴趣,并动态调制的持续需求的任务。这些结果表明,微眼跳是视觉系统获取精细空间细节的眼动策略的一部分。
The image on the retina is never stationary. Microscopic relocations of gaze, known as microsaccades, occur even during steady fixation. It has long been thought that microsaccades enable exploration of small regions in the scene in the same way saccades are normally used to scan larger regions. This hypothesis, however, has remained controversial, as it is believed that microsaccades are suppressed during fine spatial judgments. We examined the eye movements of human observers in a high-acuity visuomotor task, the threading of a needle in a computer-simulated virtual environment. Using a method for gaze-contingent display that enables accurate localization of the line of sight, we found that microsaccades precisely move the eye to nearby regions of interest and are dynamically modulated by the ongoing demands of the task. These results indicate that microsaccades are part of the oculomotor strategy by which the visual system acquires fine spatial detail.
DOI: 10.1126/science.1166112
发表时间: 2009-02-13
期刊: Science (New York, N.Y.)
影响因子: --
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