Brain Networks Modulate Parkinson's Tremor Amplitude

Parkinson's disease (PD) presents a complex clinical picture, with motor symptoms like tremor, bradykinesia, and rigidity significantly affecting patient function and quality of life [1]. While clinicians have a therapeutic armamentarium including pharmacotherapy, physical exercise [2], and deep brain stimulation [3], the fluctuating and often refractory nature of resting tremor remains a persistent challenge [4]. Patients frequently report an ability to voluntarily suppress their tremor, suggesting the existence of endogenous modulatory mechanisms [5]. Functional neuroimaging, particularly functional magnetic resonance imaging (fMRI), has provided a window into the brain activity underlying PD's diverse symptoms [6]. A more detailed map of the circuits that not only generate but also suppress tremor is needed to guide the development of more targeted and effective interventions.