注视稳定性与视觉运动敏感性之间的相关性。

Correlations between fixation stability and visual motion sensitivity.

作者信息

Murakami Ikuya

机构信息

Human and Information Science Laboratory, NTT Communication Science Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan.

出版信息

Vision Res. 2004 Apr;44(8):751-61. doi: 10.1016/j.visres.2003.11.012.

DOI:10.1016/j.visres.2003.11.012

PMID:14967202

Abstract

To assess influences of fixational drift eye movements on motion detection, lower thresholds for motion and drift amplitudes were measured in normal subjects. The threshold was higher without visible surrounds than with a surround, and had a positive correlation with drift amplitude. The same effect, but more pronounced, was found when the surround was visible but flickered synchronously. In contrast, the correlation disappeared in the threshold with a static surround. These results suggest that, while spurious image motions by eye drift can have a detrimental effect, a mechanism tuned for differential motions normally counteracts it.

摘要

为了评估注视性漂移眼动对运动检测的影响，我们测量了正常受试者的运动阈值下限和漂移幅度。没有可见背景时的阈值高于有背景时的阈值，且与漂移幅度呈正相关。当背景可见但同步闪烁时，也发现了同样的效应，但更为明显。相比之下，在有静态背景的阈值中，这种相关性消失了。这些结果表明，虽然眼漂移引起的虚假图像运动会产生不利影响，但一种针对差异运动进行调节的机制通常会抵消这种影响。