Transcutaneous Afferent Patterned Stimulation (TAPS) for Reduction of Parkinson's Disease (PD) Related Action Tremor

Inclusion Criteria: * Must be ≥22 years of age * Competent and willing to provide written, informed consent to participate in the study * Clinically significant postural tremor as defined by: * Dominant hand/arm exhibiting postural tremor ≥ 2 (while in the off state) as assessed by the MDS-UPDRS postural tremor score * Stable dose of Parkinson's disease medications, if applicable, for 30 days prior to study entry * Willing to comply with study protocol requirements including: * Having the ability to do telemedicine or video calls for study visits * remaining on a stable dosage of Parkinson's medications, if applicable, during the duration of the study * no significant caffeine consumption within 8 hours of study visits Exclusion Criteria: * Implanted electrical medical device, such as a pacemaker, defibrillator, or deep brain stimulator * Suspected or diagnosed epilepsy or other seizure disorder * Swollen, infected, inflamed areas, or skin eruptions, open wounds, or cancerous lesions of skin at stimulation site * Peripheral neuropathy affecting the tested upper extremity * Presence of any other neurodegenerative disease or dementia. These may include: multisystem atrophy, progressive supranuclear palsy, dementia with Lewy bodies, and Alzheimer's disease. * Botulinum toxin injection for hand tremor within 6 months prior to study enrollment * Are participating or have participated in another interventional clinical trial in the last 30 days which may confound the r…