A5076393922- EEG and Brain-Computer Interfaces
- Semiconductor Quantum Structures and Devices
- Neural dynamics and brain function
- Nonlinear Dynamics and Pattern Formation
- Chaos control and synchronization
- Quantum and electron transport phenomena
- Cognitive Science and Mapping
- Functional Brain Connectivity Studies
- Heart Rate Variability and Autonomic Control
- Theoretical and Computational Physics
- stochastic dynamics and bifurcation
- Neural Networks and Applications
- Complex Systems and Time Series Analysis
- Neural and Behavioral Psychology Studies
- Sleep and Wakefulness Research
- Migraine and Headache Studies
- Technology and Human Factors in Education and Health
- Physics of Superconductivity and Magnetism
- Visual perception and processing mechanisms
- Terahertz technology and applications
- Advancements in Semiconductor Devices and Circuit Design
- Sleep and related disorders
- Photonic Crystals and Applications
- Quantum chaos and dynamical systems
- Superconducting and THz Device Technology
Saratov State Medical University
2021-2024
Saratov State University
2012-2024
Institute of Physics
2021-2024
Yuri Gagarin State Technical University of Saratov
2015-2018
N. I. Lobachevsky State University of Nizhny Novgorod
2016
We show that resonant electron transport in semiconductor superlattices with an applied electric and tilted magnetic field can, surprisingly, become more pronounced as the lattice conduction temperature increases from 4.2 K to room beyond. It has previously been demonstrated at certain critical parameters, semiclassical trajectories of electrons lowest miniband superlattice change abruptly fully localized completely unbounded. The unbounded orbits propagate through intricate web patterns,...
A new approach for detection oscillatory patterns and estimation of their dynamics based by a modified CWT skeleton method is presented. The opens up additional perspectives the analysis subtle changes in activity complex nonstationary signals. was applied to analyze unique experimental signals obtained usual conditions after non-invasive increase blood-brain barrier (BBB) permeability 10 male Wistar rats. results wavelet-analysis electrocorticography (ECoG) recorded normal physiological...
The purpose of this study — is to the differences in recurrent indicators based on electroencephalography signals patients after orthodontic treatment during cognitive tests. Depending type impact (installation braces or aligners), identify markers canals, which can be used further determine strength stress from intervention for subsequent correction treatment. Methods. Recurrence analysis was data. In particular, were constructed each channel patient. Results. channels changes with...
Abstract We performed a mathematical analysis of functional connectivity in electroencephalography (EEG) patients with obstructive sleep apnea (OSA) (N = 10; age: 52.8 ± 13 years; median 49 male/female ratio: 7/3), compared group apparently healthy participants 15; 51.5 29.5 42 8/7), based on the calculation wavelet bicoherence from nighttime polysomnograms. Having observed previously known phenomenon interhemispheric synchronization deterioration, we demonstrated compensatory increase...
Multistability in the intermittent generalized synchronization regime unidirectionally coupled chaotic systems has been found. To study such a phenomenon, method for revealing existence of multistable states interacting being modification an auxiliary system approach proposed. The efficiency testified using examples logistic maps and Rössler regime. quantitative characteristic multistability introduced into consideration.
We aimed to assess which quantitative EEG changes during daytime testing in patients with sleep disorder (primary insomnia and excessive sleepiness groups). All experimental study participants were subjected a long-term test for maintaining attention sound stimuli, their EEGs recorded then processed, using wavelet analysis, order estimate the power frequency structure of alpha activity. In healthy subjects, maximum increase rhythm occurred near 9 Hz. Patients primary characterized by an...
The present work deals with the intermittent generalized synchronization regime observed near boundary of synchronization. behavior is considered in context two observable phenomena, namely, (i) birth asynchronous stages motion from complete synchronous state and (ii) multistability detection states. mechanisms governing these phenomena are revealed described this paper help modified system approach for unidirectionally coupled model oscillators discrete time.
The paper reports the results of a partial-time analysis EEG signals from healthy volunteers obtained during recording polysomnography with an expanded arrangement electrodes (19 leads). An characteristics frequency patterns (their number, duration, and energy power) was carried out in theta – band (4 6 Hz) five brain areas (central, occipital, frontal zones, left right hemispheres). A comparison according to chronotypes respondents. Based on study, it possible demonstrate chronobiological...
In this work we have used psychophysiological assessments of the human brain electrical activity according to classical neurological method for calculating evoked potential. The experiment was designed extraction cognitive potentials. Taking into account characteristic components, temporal dynamics EEG data channels investigated. This approach allows one consistently assess distribution all components potential on subject's head map. Based results potentials processing, a statistical...
This article proposes a modification of joint recurrence quantification analysis for identifying individual characteristics applied to human electroencephalography (EEG) using short time series. Statistical EEG facilitated the clarification spatial localization identified characteristics. The method can be adapted use as stage rapid automatic configuration brain–computer interface devices, which is especially relevant when working with children, due limited opportunities their long-term monitoring.
The synchronization of oscillatory activity in networks neural is usually implemented through coupling the state variables describing neuronal dynamics. In this study we discuss another but complementary mechanism based on a learning process with memory. A driver network motif, acting as teacher, exhibits winner-less competition (WLC) dynamics, while driven learner, tunes its internal couplings according to oscillations observed teacher. We show that under appropriate training learner motif...
In our work, we compare EEG time-frequency features for two types of K-complexes detected in volunteers performing the monotonous psychomotor test with their eyes closed. Type I preceded spontaneous awakenings, while after type II K-complexes, subjects continued to sleep at least 10 s after. The total number group 18 was 646, which 150 and 496. Time-frequency analysis performed using continuous wavelet transform. spectral power averaged upon several brain zones each classical frequency...
The purpose of this study was to identify promising candidates for the role biomarkers associated with different degrees apnea-hypapnea index in patients using polysomnographic recordings. Material — used polysomnography data recorded 30 nocturnal respiratory dysfunction form obstructive sleep apnea syndrome. Methods Analysis recordings carried out a joint recurrent indicator, which further statistical characteristics were assessed: average value, geometric mean, cubic median, dispersion,...