FIGURE 1.

Flowchart of the patient selection process. The reasons for exclusion merged in others are no report available (n = 3), no visible interictal electroencephalographic changes at seizure onset (n = 1), and premature termination of stereoelectroencephalogram (SEEG) due to self‐removal of electrodes (n = 1). In nine of the 151 included patients, we could only select 20 min of non‐rapid eye movement (NREM) sleep containing one or more electrographic seizure. In five, we could only select 20 min of NREM sleep <2 h away from a focal seizure. In one other patient, we could only select 10 min of NREM sleep. We decided to include these patients to be as generalizable as possible. The segments with seizures themselves were excluded. CHUGA, Grenoble‐Alpes University Hospital; MNI, Montreal Neurological Institute