Beta synchrony in the cortico-basal ganglia network during regulation of force control on and off dopamine.

ABSTRACT: Beta power suppression in the basal ganglia is stronger during movements that require high force levels and high movement effort but it has been difficult to dissociate the two. We recorded scalp EEG and basal ganglia local field potentials in Parkinson's disease patients (11 STN, 7 GPi) ON and OFF dopaminergic medication while they performed a visually-guided force matching task using a pen on a force-sensitive graphics tablet. Force adjustments were accompanied by beta power suppression irrespective of whether the force was increased or reduced. Before the adjustment was completed, beta activity returned. High beta power was specifically associated with slowing of the force adjustment. ON medication, the peak force rate was faster and cortico-basal ganglia beta phase coupling was more re

SUBMITTER: Fischer P 

PROVIDER: S-EPMC6517271 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature