Unstable slow oscillations couple with epileptogenic fast‐rhythm bistability in sleep‐related epilepsy: A stereoelectroencephalographic study

δ-Band synchrony and β-γ-band bistability are not isolated epileptogenic mechanisms but likely act synergistically, playing a pivotal role in seizure generation through the coupling of δ phases and β-γ amplitudes across large networks, with significant contributions from nonepileptogenic tissues.