Fig. 1. Polysomnographic recordings and hypnograms. A: Polysomnographic recording with polymyography. B: Recording of a single jerk. C: Hypnogram of initial video polysomnography (VPSG). D: Hypnogram of follow-up VPSG performed 1 month after initiating levetiracetam. The red box indicates a propriospinal myoclonus (PSM) event.
