Time course of conscious and unconscious semantic brain activation

被引：175

作者：

Kiefer, M ^{[1
]}

Spitzer, M ^{[1
]}

机构：

[1] Univ Ulm, Dept Psychiat, D-89075 Ulm, Germany

来源：

NEUROREPORT | 2000年 / 11卷 / 11期

关键词：

event-related potentials; masked semantic priming; unconscious perception;

D O I：

10.1097/00001756-200008030-00013

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Event-related brain potentials (ERPs) were used to investigate the neurophysiological correlates of conscious and unconscious semantic processing. Masked words, which do not enter consciousness, as well as visible words, were shown to modulate the N400 ERP potential to subsequently presented, meaningfully related target words. The N400 is known as an electrophysiological index of semantic processing. However, for unconsciously perceived words semantic brain activation decays fast within 200 ms, but increases with time for consciously perceived words. Thus, conscious and unconscious semantic activation involves similar brain areas, but both forms of processes exhibit distinct, qualitatively different time courses. NeuroReport 11:2401-2407 (C) 2000 Lippincott Williams & Wilkins.

引用

页码：2401 / 2407

页数：7

共 25 条

[1] AUDITORY AND VISUAL SEMANTIC PRIMING USING DIFFERENT STIMULUS ONSET ASYNCHRONIES - AN EVENT-RELATED BRAIN POTENTIAL STUDY [J].