UNIGE document Scientific Article
previous document  unige:20804  next document
add to browser collection

Errors can be related to pre-stimulus differences in ERP topography and their concomitant sources

Published in NeuroImage. 2010, vol. 49, no. 3, p. 2774-2782
Abstract Much of the variation in both neuronal and behavioral responses to stimuli can be explained by pre-stimulus fluctuations in brain activity. We hypothesized that also errors are the result of stochastic fluctuations in pre-stimulus activity and investigated the temporal dynamics of the scalp topography and their concomitant intracranial generators of stimulus- and response-locked high-density event-related potentials (ERPs) to errors and correct trials in a Stroop task. We found significant differences in ERP map topography and intracranial sources before the onset of the stimulus and after the initiation of the response but not as a function of stimulus-induced conflict. Before the stimulus, topographic differences were accompanied by differential activity in lateral frontal, parietal and temporal areas known to be involved in voluntary reorientation of attention and cognitive control. Differential post-response activity propagated both medially and laterally on a rostral-caudal axis of a network typically involved in performance monitoring. Analysis of the statistical properties of error occurrences revealed their stochasticity.
Keywords Adult*ArtifactsAttention/physiologyBrain/*physiology*Brain Mapping*ElectroencephalographyEvoked Potentials, VisualFemaleHumansMaleReaction TimeYoung Adult
PMID: 19850140
Full text
Research group Organisation et plasticité des réseaux neuronaux cérébraux (148)
(ISO format)
BRITZ, Juliane, MICHEL, Christoph. Errors can be related to pre-stimulus differences in ERP topography and their concomitant sources. In: NeuroImage, 2010, vol. 49, n° 3, p. 2774-2782. doi: 10.1016/j.neuroimage.2009.10.033 https://archive-ouverte.unige.ch/unige:20804

334 hits

0 download


Deposited on : 2012-05-23

Export document
Format :
Citation style :