Tonic Motor Cortex Activation during Finger Movements Analyzed by Simultaneous DC Magnetoencephalography and DC Electroencephalography

Functional neuroimaging studies showed a linearly stronger motor cortex activation with increasing rates of repetitive finger movements. During very fast movements this correlation is abolished probably because of automation. Methodologically, these studies visualize neuronal activation indirectly via concomitant vascular/metabolic changes. In a complementary approach, DC magnetoencephalography (DC-MEG) as well as DC electroencephalography (DC-EEG) measure slow neuronal activation dynamics directly. Here, simultaneous DC-MEG and DC-EEG were used to characterize cortical neuronal activation during repetitive fing…