Visual awareness of low-contrast stimuli is reflected in event-related brain potentials

被引：51

作者：

Ojanen, V

Revonsuo, A

Sams, M

机构：

[1] Helsinki Univ Technol, Lab Computat Engn, FIN-02015 Helsinki, Finland

[2] Turku Univ, Ctr Cognit Neurosci, Turku, Finland

来源：

PSYCHOPHYSIOLOGY | 2003年 / 40卷 / 02期

关键词：

neural correlates of visual awareness; explicit processing; ERP; perceptual threshold; processing speed;

D O I：

10.1111/1469-8986.00021

中图分类号：

B84 [心理学];

学科分类号：

04 ; 0402 ;

摘要：

Visual awareness was studied in 11 subjects by using coherent and scrambled objects as stimuli. The stimuli were presented near the subjective perceptual threshold. Explicitly recognized stimuli elicited a specific negative ERP deflection peaking at 460 ms. Our reaction time experiment suggests that this visual awareness negativity (VAN) is similar to that found previously at a shorter latency. We propose that VAN might reflect the exact moment of becoming aware of the task-relevant stimulus properties and provide an online marker of the temporal dynamics of visual awareness.

引用

收藏

页码：192 / 197

页数：6

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