Figure 3: Polygraphic study in one of our patients. Patient FGR 24 years old. Figure 3A shows fast rhythms during stage 2 non-REM sleep. Note the presence of normal sleep spindles. Figure 3B (the same patient) shows a diffuse fast rhythm without deltoid contraction (interictal pattern) followed by a typical asymmetric tonic seizure. See right deltoid tonic contraction before mild left deltoid contraction. DE means deltoid muscle: D (right) I (left). OC refers to oculograms: D (right), L (left).Figure 3 C see the normal background in one of our patient.