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Frontocentral DC-potential shifts predicting behavior with or without a motor task.

J M Morgan·M Wenzl·W Lang·G Lindinger·L Deecke
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Abstract

This study was designed to investigate the predictive value of the event-related potentials (ERPs) preceding the initiation of a difficult perceptual-memory task and to investigate whether these ERPs require a motor movement on the part of the subject for their occurrence. Across 4 conditions the DC-potential shifts were recorded from 23 right-handed subjects using DC amplifiers. Although the start of each trial began with a ready signal, the conditions differed in that the subjects initiated the task by a button press in 2 conditions and the computer initiated it in 2 others without a press. The results showed that, especially in the frontocentral electrode sites, the DC-potential shifts which began those trials ending in correct performance were more negative relative to those trials ending in an incorrect response. Those conditions which required the subjects to self-initiate the trial and those which were initiated by the computer showed similar results indicating that the negative DC-potential shifts preceding correct performance are neither produced by nor depend on a task initiating motor movement. The onset of the DC-potential shifts preceded task initiation by up to 4.1 sec indicating that they were more than the Bereitschaftspotential.

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AdultBehaviorCerebral CortexContingent Negative VariationElectroencephalographyEvoked PotentialsFemaleHumansMaleMovementTask Performance and AnalysisJournal ArticleResearch Support, Non-U.S. Gov't

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BibTeXRIS

J M Morgan, M Wenzl, W Lang, G Lindinger, L Deecke. 1992. Frontocentral DC-potential shifts predicting behavior with or without a motor task.. https://doi.org/10.1016/0013-4694(92)90074-r

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