Pallidal Beta Activity Is Linked to Stimulation‐Induced Slowness in Dystonia

ABSTRACT Background Pallidal deep brain stimulation (DBS) effectively alleviates symptoms in dystonia patients, but may induce movement slowness as a side‐effect. In Parkinson's disease, hypokinetic symptoms have been associated with increased beta oscillations (13–30 Hz). We hypothesize that this pattern is symptom‐specific, thus accompanying DBS‐induced slowness in dystonia. Methods In 6 dystonia patients, pallidal rest recordings with a sensing‐enabled DBS device were performed and tapping speed was assessed using marker‐less pose estimation over 5 time points following cessation of DBS. Results After cessation of pallidal stimulation, movement speed increased over time (P