Abstract
In this work, we propose a modification of the wavelet oscillatory pattern method for analyzing energy characteristics of oscillatory components in complex signals. The energy analysis of oscillatory wavelet patterns allows fast two-dimensional sorting of oscillatory components in frequency and power, thus allows for further statistical calculation of the observed technologies. Counting operations are simply realized on the base of parallel calculations. The presented technique could be used in studying the electrophysiological features of brain activity during animals sleep and awake. The method was used in investigations of brain’s electrophysiological characteristics during sleep and awake in animals. We found out that standard energy analysis could determine NREM sleep and awake condition in rats with normal weight and obesity. However, calculation of energy characteristics of the ECoG patterns in animals of two groups demonstrate a significant transformation of electrophysiological signals oscillatory structure during NREM sleep and awake in rats with severe visceral obesity. We suppose the changes of these characteristics may be associated with shifts in homeostasis indicators due to animal obesity.
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Data availability
The datasets generated during and analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
This work has been supported by the Russian Science Foundation (Project no. 22-72-10061) in part of the development of wavelet skeleton modification for data analysis. The experimental work with Wistar rats was carried out with the support of the RF Government Grant no. 075-15-2022-1094
M.S., A.R, M.O. would like to express their thanks to Dr. Olga Posnenkova (Institute of Cardiological Research, SSMU) for helpful discussions and general support of the work.
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Simonyan, M., Fisun, A., Afanaseva, G. et al. Oscillatory wavelet-patterns in complex data: mutual estimation of frequencies and energy dynamics. Eur. Phys. J. Spec. Top. 232, 595–603 (2023). https://doi.org/10.1140/epjs/s11734-022-00737-w
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DOI: https://doi.org/10.1140/epjs/s11734-022-00737-w