The effect of deviant stimulus probability on the human mismatch process
作者:
Yasuharu Sato,
Hirooki Yabe,
Tomiharu Hiruma,
Takeyuki Sutoh,
Naoko Shinozaki,
Tadayoshi Nashida,
Sunao Kaneko,
期刊:
NeuroReport
(OVID Available online 2000)
卷期:
Volume 11,
issue 17
页码: 3703-3708
ISSN:0959-4965
年代: 2000
出版商: OVID
关键词: Auditory event-related potentials;Development of a memory trace;Effect of probability;Frontal MMN generator;Mismatch negativity;Temporal MMN generator
数据来源: OVID
摘要:
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.
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