Author response: The nature of postural tremor in Parkinson disease.

Abstract

We appreciate Dr. Jankovic's comments on our recently published article.1 Our findings suggest that reemergent tremor is fundamentally the same as resting tremor. In our cohort (n = 48), the average latency between movement and tremor reemergence was 15.9 seconds. The latency varied considerably (1 to >60 seconds) but was not associated with disease or tremor severity. Recent work suggests that reafference from voluntary movements may reset tremor,2 but other mechanisms may also apply.3