Fig. 2
Description of the experimental protocol and the unsupervised learning approach. (A) Brain Computer Interface (BCI) study design and resting-state EEG recordings at V0 (pre-training) and V21 (post-training). (B) At V0 and V21, pairwise synchrony was computed for each 2-s EEG epoch across channels, then averaged within the frontal, central, and parieto-occipital regions. (C) For each individual, the associated 64 EEG epochs were clustered based on their synchrony values, yielding a 3D representation of individual neural modulation dynamics per brain region. (D) Spectral bi-clustering was applied to these representations from all individuals to identify subjects exhibiting successful neural self-modulation.
