Polyelectromyography Under Propofol to Differentiate Functional from Idiopathic Dystonia: A Pilot Study

During mild sedation, EMG activity persisted in all ID (100%) and in 9 (90%) FD patients. During deep sedation, EMG activity persisted in 9 (53%) ID patients and was absent in all FD patients (100%) (P = 0.01). During partial recovery of consciousness, EMG activity was present in all (100%) ID and only in 1 (10%) FD patients (P < 0.001). At full recovery, a different muscular activation pattern from baseline was observed in 7 (70%) FD and only in 1 (6%) ID patients (P = 0.001) CONCLUSIONS: EMG silence during deep sedation and partial recovery may serve as a neurophysiological marker of FD. A muscular activation pattern differing from baseline may represent a neurophysiological clue for incongruence © 2025 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.