Table 1.

Classification of the seizures stages using data-driven approach on Granger's Causality data; principle component analysis (PCA) showed that the three stages had distinct mean Granger's Causality values.

G causality mean	Preseizure (eigenvalue)	Seizure (eigenvalue)	Postseizure (eigenvalue)
Thalamus-frontal	0.732	0.731	0.777
Frontal-thalamus	0.72	0.677	0.747
Thalamus-parietal	0.626	0.552	0.552
Parietal-thalamus	0.79	0.766	0.882
Thalamus-hippocampus	0.666	0.72	0.734
Hippocampal-thalamus	0.813	0.83	0.865
Extraction method: principal component analysis
Rotation method: Varimax with Kaiser Normalization
PC, principal component