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Basis profile curve identification to understand electrical stimulation effects in human brain networks

Fig 4

Projection of basis profile curves (BPCs).

A: The contribution of each BPC B_q to a single trial from its cluster can be quantified according to a scalar multiplier , and residual noise ε_k (trial 238 illustrated). B: The 3 BPCs for our example case. C: The spatial representation of BPCs, color-coded, with diameter and color intensity indicating magnitude (group-averaged signal-to-noise ratio). White circles show actual electrode locations and BPC projection magnitudes are placed at the the spatial average of the positions of the two stimulated electrodes. Each BPC distribution is individually scaled to maximum. Gray indicates sites discarded by thresholding (Fig 3G).

doi: https://doi.org/10.1371/journal.pcbi.1008710.g004