Time course of conscious and unconscious semantic brain activation.
paper
Cited
Public
Unavailable
- Authors
- Kiefer, M; Spitzer, M
- Year
- 2000
- Journal
- Neuroreport
- PMID
- 10943693
- DOI
- 10.1097/00001756-200008030-00013
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.
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