Figure 2

Occurence of rest and action tremor and the effect of DBS on tremor power. A) The number of extremities showing tremor. An extremity was included in this graph when at least one of the 3-second windows of the recorded signal at this extremity was classified as a tremor window. For each DBS setting the number of extremities showing either action tremor (AT) or rest tremor (RT), or both, is indicated. B) Comparing the absolute power in the tremor frequency band at DBSon and DBS80% with DBSoff a reduction or enhancement of tremor can be observed for both action and rest tremor. For this calculation the average absolute tremor power over all tremor windows for each extremity is included irrespective of the duration of tremor. In case tremor is reduced for DBSon (or DBS80%), the reduction is calculated as (P_DBSoff-P_DBSon)/ P_DBSoff*100%; in case tremor is enhanced at DBSon (or DBS80%) compared to DBSoff, the enhancement is calculated as (P_DBSon-P_DBSoff)/ P_DBSon*100%. The number of extremities that was included in the calculation of the average reduction or enhancement is indicated inside each bar.