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@article{2351977,
author = {Přibylová, Lenka and Ševčík, Jan and Eclerová, Veronika and Klimeš, Petr and Brázdil, Milan and Meijer, Hil},
article_number = {1},
doi = {http://dx.doi.org/10.1162/netn_a_00351},
keywords = {Very High-Frequency Oscillations; Ultra-Fast Oscillations; Neuronal Network Model; Phase-Shifting Synchrony; Bifurcations; Epilepsy},
language = {eng},
issn = {2472-1751},
journal = {Network Neuroscience},
title = {Weak coupling of neurons enables very high-frequency and ultra-fast oscillations through the interplay of synchronized phase-shifts},
url = {https://doi.org/10.1162/netn_a_00351},
volume = {8},
year = {2024}
}
TY - JOUR
ID - 2351977
AU - Přibylová, Lenka - Ševčík, Jan - Eclerová, Veronika - Klimeš, Petr - Brázdil, Milan - Meijer, Hil
PY - 2024
TI - Weak coupling of neurons enables very high-frequency and ultra-fast oscillations through the interplay of synchronized phase-shifts
JF - Network Neuroscience
VL - 8
IS - 1
SP - 293-318
EP - 293-318
PB - MIT Press
SN - 24721751
KW - Very High-Frequency Oscillations
KW - Ultra-Fast Oscillations
KW - Neuronal Network Model
KW - Phase-Shifting Synchrony
KW - Bifurcations
KW - Epilepsy
UR - https://doi.org/10.1162/netn_a_00351
N2 - Recently, in the past decade, high-frequency oscillations (HFOs), very high-frequency oscillations (VHFOs), and ultra-fast oscillations (UFOs) were reported in epileptic patients with drug-resistant epilepsy. However, to this day, the physiological origin of these events has yet to be understood. Our study establishes a mathematical framework based on bifurcation theory for investigating the occurrence of VHFOs and UFOs in depth EEG signals of patients with focal epilepsy, focusing on the potential role of reduced connection strength between neurons in an epileptic focus. We demonstrate that synchronization of a weakly coupled network can generate very and ultra high-frequency signals detectable by nearby microelectrodes. In particular, we show that a bistability region enables the persistence of phase-shift synchronized clusters of neurons. This phenomenon is observed for different hippocampal neuron models, including Morris-Lecar, Destexhe-Paré, and an interneuron model. The mechanism seems to be robust for small coupling, and it also persists with random noise affecting the external current. Our findings suggest that weakened neuronal connections could contribute to the production of oscillations with frequencies above 1000Hz, which could advance our understanding of epilepsy pathology and potentially improve treatment strategies. However, further exploration of various coupling types and complex network models is needed.
ER -
PŘIBYLOVÁ, Lenka, Jan ŠEVČÍK, Veronika ECLEROVÁ, Petr KLIMEŠ, Milan BRÁZDIL a Hil MEIJER. Weak coupling of neurons enables very high-frequency and ultra-fast oscillations through the interplay of synchronized phase-shifts. \textit{Network Neuroscience}. MIT Press, 2024, roč.~8, č.~1, s.~293-318. ISSN~2472-1751. Dostupné z: https://dx.doi.org/10.1162/netn\_{}a\_{}00351.
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