What distinguishes essential tremor from Parkinson’s tremor?

Essential tremor is primarily characterized by its occurrence during action, particularly when the individual is trying to perform a task, such as writing or holding a cup. In contrast, Parkinson's tremor typically occurs at rest, distinguishing it from essential tremor. The correct choice highlights that Parkinson's disease often presents a range of additional symptoms beyond the tremor itself, which can include rigidity, bradykinesia, and postural instability. These associated symptoms provide a broader context for diagnosis and management of Parkinson's disease compared to essential tremor, which mainly consists of isolated tremors with less influence from such systemic effects. The presence of these accompanying symptoms offers valuable insight into the underlying disease process and can guide treatment strategies for patients affected by Parkinson's disease.