The impact of a decision process upon scalp recorded premovement potential.
Twelve normal subjects were asked to select one finger after a warning signal and to move it. Using different modes of averaging the EEG responses, it is shown that: (i) the selection of a finger is accompanied by a distinct negative slow potential consisting of a rapid set-up and a following plateau which is the most prominent under the Fz electrode, and (ii) the decision process, when dispersed within a large interval in repeated trials, gives rise to a slow progressive increase of negativity resembling the early component of premovement slow cortical potential from the classical self-paced paradigm.
Kukleta
M
M
Department of Physiology, Komenského 2, Brno, Czech Republic.
Lamarche
M
M
D000328:Adult; D001921:Brain / Q000502:physiology*; D004569:Electroencephalography; D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D009434:Neural Pathways / Q000502:physiology*