EEG Spectral Characteristics During Voluntary Motor Activity

Abstract

EEG spectral characteristics were studied in 11 essentially healthy volunteers during performance of unfamiliar finger movements with both hands with a voluntary rhythm. As compared with the resting state, preparation and performance of voluntary movements occurred on the background of decreased activation levels in almost all areas of the cortex except the right frontal area, where the EEG showed a clear increase in the power of fast (especially γ) frequencies regardless of which hand was used to perform the movements. This may be evidence for the direct involvement of this area in the processes underlying the planning, initialization, and control of voluntary movement activity.