The effect of deviant stimulus probability on the human mismatch process

Citation
Y. Sato et al., The effect of deviant stimulus probability on the human mismatch process, NEUROREPORT, 11(17), 2000, pp. 3703-3708
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Neurosciences & Behavoir
Journal title
NEUROREPORT
ISSN journal
0959-4965 → ACNP
Volume
11
Issue
17
Year of publication
2000
Pages
3703 - 3708
Database
ISI
SICI code
0959-4965(20001127)11:17<3703:TEODSP>2.0.ZU;2-J
Abstract
The present study addresses the separate activities of frontal and temporal MMN generators which might be differentially affected by a change in the p robability of standard stimuli. As the probability of standard stimuli was increased, the frontal MMN component significantly increased in amplitude, while the temporal one was not affected. Correspondingly, the scalp current density (SCD) maps showed that the temporal MMN generator was activated ev en at low probability of standard stimuli, suggesting that even the weak me mory trace could start the automatic mismatch process, whereas the frontal MMN generator was activated only with increased probabilities of standard s timuli, suggesting that the stronger the memory trace is, the easier it mig ht trigger the involuntary switching of attention to stimulus change. Neuro Report 11:3703-3708 (C) 2000 Lippincott Williams & Wilkins.