Figure 3
From: Seizure localization using pre ictal phase-amplitude coupling in intracranial electroencephalography
Principal component analysis of PLV vectors. (a–c) PLV between delta and the remaining bands (theta, alpha, beta and gamma). Distribution of samples on the PC1-PC2 plane (colours indicate the K-means cluster). Electrodes in the epileptic zone belong to a separated group. (d) Distribution of Similarity Index (SI). SI values tend to 1 as the group of involved electrodes get closer to one of the K-means clusters. (e) SI for patients with localized (L) and non-localized (NL) epilepsy, SI was higher in the group of localized epilepsy patients (p = 0.015, Wilcoxon signed-rank test).
