Abstract
Periodic features of local field potentials (LFP) are extensively studied to establish the pathophysiological features contributing to Parkinson's disease (PD). Pathological LFP synchronization in the subthalamic nucleus (STN) was assumed to link with motor signs of PD. Commonly, the association between oscillations and clinical signs is studied while the patients are at rest. However, changes in LFPs during movement may reflect particular traits of motor processing in the basal ganglia under PD. Recently, the aperiodic 1/f broadband component of LFP spectra has attracted the attention of researchers because it may provide meaningful information about the neural activity in the brain. Here, we compared LFP signals in the STN of parkinsonian patients at rest and during hand movements occasionally followed by leg movements using two approaches, one of which accounts for the aperiodic features of LFP spectra. Using both methods, a significant increase was observed in synchronization in the low beta range during sequent leg but not hand movements. For either movement, there was a significant increase in gamma range synchronization using uncorrected power spectra and a significant decrease in the slope of the aperiodic component for...Continue Reading
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