Network characteristics in benign epilepsy with centro-temporal spikes patients indicating defective connectivity during spindle sleep: A partial directed coherence study of EEG signals.

•Partial directed coherence (PDC) showed increased out-flow in T4 and T3 of Right-BECTS and Left-BECTS patients only.•During spindle-sleep, reduced in- and out-flow characterized most of the nodes in all BECTS patients.•PDC indicates a condition of relatively isolated cortical areas possibly favouring epileptic activities.