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腹侧视觉通路中的知觉连续性与知觉持续性的出现。

Perceptual continuity and the emergence of perceptual persistence in the ventral visual pathway.

作者信息

Large Mary-Ellen, Aldcroft Adrian, Vilis Tutis

机构信息

University of Western Ontario, Department of Psychology, Social Science Centre, London, Ontario N6A 5C2, Canada.

出版信息

J Neurophysiol. 2005 Jun;93(6):3453-62. doi: 10.1152/jn.00934.2004. Epub 2005 Jan 19.

Abstract

Perceptual continuity is an important aspect of our experience of the visual world. In this study, we focus on an example of perceptual continuity involving the maintenance of figure-ground segregation despite the removal of binding cues that initiated the segregation. Fragmented line drawings of objects were superimposed on a background of randomly oriented lines. Global forms could be discriminated from the background based on differences in motion or differences in color/brightness. Furthermore, perception of a global form persisted after the binding cue had been removed. A comparison between the persistence of forms constructed from motion or color demonstrated that both forms produced persistence after the object defining cues were removed. Functional imaging showed a gradual increase in the persistence of brain activity in the lower visual areas (V1, V2, VP), which reached significance in V4v and peaked in the lateral occipital area. There was no difference in the location of persistence for color- or motion-defined forms. These results suggest that the retention of a global percept is an emerging property of the ventral visual processing stream and the maintenance of grouped visual elements is independent of cue type. We postulated that perceptual persistence depends on a system of perceptual memory reflecting the state of perceptual organization.

摘要

知觉连续性是我们视觉世界体验的一个重要方面。在本研究中,我们聚焦于一个知觉连续性的例子,即尽管引发图形-背景分离的绑定线索被移除,但图形-背景分离仍得以维持。物体的碎片化线条图被叠加在随机取向线条的背景上。基于运动差异或颜色/亮度差异,可以从背景中辨别出整体形状。此外,在绑定线索被移除后,对整体形状的感知仍然持续。对由运动或颜色构建的形状的持续性进行比较表明,在定义物体的线索被移除后,两种形状都产生了持续性。功能成像显示,视觉较低区域(V1、V2、VP)的大脑活动持续性逐渐增加,在V4v区域达到显著水平,并在枕叶外侧区域达到峰值。颜色或运动定义的形状在持续性位置上没有差异。这些结果表明,整体知觉的保留是腹侧视觉处理流的一种新兴属性,并且分组视觉元素的维持与线索类型无关。我们推测,知觉持续性取决于反映知觉组织状态的知觉记忆系统。

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