InterJournal Complex Systems, 639
Status: Submitted
Manuscript Number: [639]
Submission Date: 40326
Revised On: 40326
Controlling Chaos in the Brain and Structure of Music Tonality
Author(s): Igor Yevin

Subject(s): CX.41

Category: Brief Article


Investigations of human and animal electro-encephalograms (EEGs) have shown that these signals represent deterministic chaotic processes with the number of degrees of freedom from about 2 to 10, depending on the functional state of the brain (awaking, sleep, epilepsy). Recent investigations revealed that music tends to reduce the degree of chaos in brain waves. For some epilepsy patients music triggers their seizures. Loskutov , Hubler and co-workers and others studied control of deterministic chaotic systems. It was found that carefully chosen tiny perturbation could stabilize any of unstable periodic orbits making up a strange attractor. Computer experiments have shown the possibility to control chaotic behavior in neural networks by external periodic pulsed force or sinusoidal force. We suggest that indeed the stable steps of music tonalities and appropriate chords are those tiny perturbations that control chaos in the brain. Any musical score might be considered as a program of controlling chaos in the brain. One may propose that the aim of this control is to establish coherent behavior in the brain, because many integrative cognitive functions of the brain are related to a temporal coherence .

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