L-dopa - the main event

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N2 - We tested whether dispersible L-dopa has acute effects on event-related desynchronization (ERD) of the mu rhythm in patients with idiopathic Parkinson's disease (IPD). ERD to voluntary movement is delayed in akinetic IPD patients and improves after chronic L-dopa treatment. We evaluated ERD to self-paced finger movement in 14 IPD patients (before and 30-40 min after oral administration of dispersible L-dopa) and in 10 normal subjects. Sensorimotor ERD onset contralateral to movement was significantly delayed in IPD patients compared to normal subjects. This abnormality was no longer significant after L-dopa treatment. We conclude that a single dose of dispersible L-dopa can improve not only motor performance in IPD patients but also the timing of cortical activation of sensorimotor areas during motor programming.

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