The effect of deviant stimulus probability on the human mismatch process

The present study addresses the separate activities of frontal and temporal MMN generators which might be differentially affected by a change in the probability of standard stimuli. As the probability of standard stimuli was increased, the frontal MMN component significantly increased in amplitude,...

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Veröffentlicht in:Neuroreport 2000-11, Vol.11 (17), p.3703-3708
Hauptverfasser: Sato, Yasuharu, Yabe, Hirooki, Hiruma, Tomiharu, Sutoh, Takeyuki, Shinozaki, Naoko, Nashida, Tadayoshi, Kaneko, Sunao
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container_end_page 3708
container_issue 17
container_start_page 3703
container_title Neuroreport
container_volume 11
creator Sato, Yasuharu
Yabe, Hirooki
Hiruma, Tomiharu
Sutoh, Takeyuki
Shinozaki, Naoko
Nashida, Tadayoshi
Kaneko, Sunao
description The present study addresses the separate activities of frontal and temporal MMN generators which might be differentially affected by a change in the probability 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 even at low probability of standard stimuli, suggesting that even the weak memory trace could start the automatic mismatch process, whereas the frontal MMN generator was activated only with increased probabilities of standard stimuli, suggesting that the stronger the memory trace is, the easier it might trigger the involuntary switching of attention to stimulus change.
doi_str_mv 10.1097/00001756-200011270-00023
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source MEDLINE; Journals@Ovid Complete
subjects Acoustic Stimulation
Adult
Attention - physiology
Behavioral psychophysiology
Biological and medical sciences
Electroencephalography
Electrophysiology
Evoked Potentials, Auditory - physiology
Fundamental and applied biological sciences. Psychology
Humans
Male
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
title The effect of deviant stimulus probability on the human mismatch process
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