事象関連コヒーレンス解析を用いた脳磁界聴性40Hz応答の検討

概要

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We examined the event-related coherence of magnetoencephalography (auditory 40-Hz response) while the subjects were presented click acoustic stimuli at repetition rate 40Hz in the ‘Attend and ‘Reading conditions. MEG signals were recorded of 5 healthy males using the whole-head SQUID system. The event-related coherence was used to provide a measurement of short synchronization which occurs in response to a stimulus. The results showed that the peak value of coherence in auditory 40-Hz response between right and left temporal regions was significantly larger when subjects paid attention to stimuli (‘Attend condition) rather than it was when the subject ignored them (‘Reading condition). Moreover, the latency of coherence in auditory 40-Hz response was significantly shorter when the subjects paid attention to stimuli (‘Attend condition). These results suggest that the phase synchronization between right and left temporal region in auditory 40-Hz response correlate closely with selective attention.
社団法人電気学会の論文
2005-06-01