Fig 2. Correlation with a common physiological mechanism.

Average distance between autocorrelation C_xx and cross-correlation C_xy from (A) electrophysiological records and from (B) series of interspike intervals. The color bar shows the degree of similarity, with blue indicates more correlation (less distance between C_xx and C_xy). Distributions of sum of normalized autocorrelation coefficients from (C) electrophysiological records and from (D) series of interspike intervals. (E) Correlation of waveform morphologies from II and PIS activities with PCA. Each color represents a patient in which the electrophysiological signals was recorded. (F) Same picture as (E) but emphasizing the discrimination of II (blue) and PIS (red) activities.