PMID: 10478709Sep 9, 1999Paper

Sources of movement-related cortical potentials derived from foot, finger, and mouth movements

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
G W MillikenI M Tarkka


Movement-related cortical potentials (MRCPs) register brain electrical activity before and during movement execution. In an attempt to delineate the components of MRCPs that reflect common sources to various movements and that are movement-specific, simple self-paced voluntary foot, finger, and mouth movements were studied. MRCPs were recorded in eight healthy volunteers with 30 electrodes placed on the scalp. Data were analyzed using Brain Electric Source Analysis software, and multiple equivalent dipole models were developed to separate spatial and temporal aspects of brain activity related to the execution of voluntary movements. Independent models were separately developed for the grand average data and for the individual subjects' data for each movement type. MRCPs derived from foot movements were accounted for using a 5-dipole model, finger movements using an 8-dipole model, and mouth movements with a 7-dipole model, yielding the grand average residual variances of 3%, 2%, and 6%, respectively. Based on individual models, intersubject variability of dipole locations was less than 10 mm (+/- SD). Overlaying the mean dipole coordinates onto the stereotaxic atlas provided proof that the sensorimotor cortical areas, supplemen...Continue Reading


Jul 14, 1976·Biological cybernetics·L DeeckeH H Kornhuber
Feb 1, 1990·Electroencephalography and Clinical Neurophysiology·I M Tarkka, M Hallett
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