| Issue |
Math. Model. Nat. Phenom.
Volume 16, 2021
|
|
|---|---|---|
| Article Number | 54 | |
| Number of page(s) | 23 | |
| DOI | https://doi.org/10.1051/mmnp/2021045 | |
| Published online | 06 October 2021 | |
Analysis of phase waves in the ECoG data*
CorStim SAS,
Montpellier, France.
** Corresponding author: alexandre.aksenov@corstim.com
Received:
30
July
2021
Accepted:
26
August
2021
Subdural ECoG data recorded from the matrix of electrodes during syllable pronunciation are analyzed by the method of circular-linear regression. Phase waves in 1D electrode arrays and in the whole 2D set of electrodes are detected, and their spatial organization and temporal evolution are studied. Phase portraits of wave vectors indicate the presence of sources, sinks, and saddle points. The analysis of temporal evolution of phase portraits shows that they changed more at the beginning of syllable pronunciation. Furthermore, wave sources were more stable in their localization during the pronunciation. Overall, in spite of large variability of phase portraits, they represent some characterization of the dynamics of electric potential in the cerebral cortex.
Mathematics Subject Classification: 92-10
Key words: ECoG data / phase waves / syllable pronunciation
© The authors. Published by EDP Sciences, 2021
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