Electrophysiological correlates of figure-ground segregation directly reflect perceptual saliency

被引：21
|
作者：
Straube, Sirko [1 ]
Grimsen, Cathleen [1 ]
Fahle, Manfred [1 ,2 ]
机构：
[1] Univ Bremen, Dept Human Neurobiol, D-28359 Bremen, Germany
[2] City Univ London, Dept Optometry & Visual Sci, Henry Wellcome Labs Vis Sci, London EC1V 0HB, England
来源：
VISION RESEARCH | 2010年 / 50卷 / 05期
关键词：
Cue combination; Event-related potentials; Figure-ground segregation; Human; Identification; Time-frequency analysis; OBJECT-RECOGNITION AREAS; TEXTURE SEGREGATION; FEATURE CONTRAST; SPATIOTEMPORAL DYNAMICS; FUNCTIONAL-ORGANIZATION; CONTOUR INTEGRATION; VISUAL-ATTENTION; GAMMA ACTIVITY; COLOR; ORIENTATION;
D O I：
10.1016/j.visres.2009.12.013
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
In a figure identification task, we investigated the influence of different visual cue configurations (spatial frequency, orientation or a combination of both) oil the human EEG Combining psychophysics with ERP and time-frequency analysis, we show that the neural response at about 200 ms reflects perceptual saltency rather than physical cue contrast Increasing saliency Caused (i) a negative shift of the posterior P2 coinciding with a power decrease in the posterior theta-band and (ii) an amplitude and latency increase of the posterior P3 We demonstrate that visual Cues interact for a percept that is non-linearly related to the physical figure-ground properties (C) 2010 Elsevier Ltd All rights reserved
引用
收藏
页码：509 / 521
页数：13
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