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Press Releases

DATE2024.10.08 #Press Releases

Oscillation mode decomposition of thermodynamic dissipation and its application to brain data analysis

Summary of Presentation

Graduate student Daiki Sekizawa and Associate Professor Masafumi Oizumi, Graduate School of Arts and Sciences, and Associate Professor Sosuke Ito, Graduate School of Science, the University of Tokyo have shown that part of the thermodynamic dissipation (entropy production rate) can be decomposed into contributions for each oscillation mode. By applying the decomposition to ECoG (electrocorticography) data of monkey brain activity, they found that most of the thermodynamic dissipation in the anesthetized state comes from delta waves, which are slow oscillations. They also found that EEG components such as theta and alpha waves, which are faster oscillations than delta waves, contribute more significantly in the resting state. These results are expected to be useful for understanding oscillatory phenomena that are universally observed not only in the brain but also in various living systems from the viewpoint of nonequilibrium thermodynamics.


Figure: Oscillation mode decomposition of thermodynamic dissipation

Associate Professor Sousuke Ito Universal Biology Institute (UBI), Graduate School of Science in the presentation of the research results.

Related link: Graduate School of Arts and Sciences

Journals

Journal name
Physical Review X
Title of paper