「阿吽の呼吸」の神経基盤

Neural Basis of “Breath of Aun”

指揮者やメトロノームなしに複数の演奏者が自律的に同期をとり，「阿吽の呼吸」で一糸乱れぬ演奏を実現する音楽表現が，地球上のさまざまな文化圏に数多く存在する。その典型例としてインドネシア・バリ島の祭祀芸能ケチャを取り上げ，ケチャ演奏中の複数人から脳波同時計測を行ったところ，演奏前に比較し演奏中と演奏後には，脳波の個体間同期が増強することがわかった。脳機能の同期と社会や文化との関わりについて考察する。

Abstract

Many musical expressions exist in various cultures of the world, where multiple performers autonomously synchronize without a conductor or a metronome, and achieve an undisturbed musical performance by “breath of Aun”. As a typical example, we considered the ritual performing art of Kecak in Bali, Indonesia, and performed simultaneous electroencephalogram (EEG) measurements on multiple participants during a Kecak performance. The study revealed that the inter-individual synchronization of the EEG during and after the performance was enhanced as compared to that before the performance. The author will also discuss the relation between synchronization of brain function and society and the culture of Bali.