title: Frontal and parietal ERPs associated with duration discriminations with or without task interference.
abstract: The main objective of this study was to examine fronto-parietal networks underlying visual duration discriminations. Two types of interference tasks were used to augment cognitive load: line orientation associated with the right hemisphere and multiplication with the left. Both subtasks deteriorated duration discriminations, more severely for line orientation. Relative to the condition without interference, the dual task paradigm decreased amplitudes of the contingent negative variation (CNV) wave, predominant at frontal sites, and the P300 wave, predominant at parietal sites. Inversely, amplitudes of a later appearing positive component (LPC) and its parietal counterpart of opposite polarity (LNC) increased with spatial or numeric task interference. These results are concordant with the view that fronto-parietal networks underlying duration discriminations act in a concerted fashion, with the LPC/LNC waves acting as a warning signal to mitigate errors during high cognitive load.
authors: Université de Rouen, Faculté des Sciences, Laboratoire de Psychologie et Neurosciences de la Cognition (EA1780), 76821 Mont-Saint-Aignan Rouen Cedex, France.
authors: Emilie
authors: E
authors: Gontier
authors: Christophe
authors: C
authors: Le Dantec
authors: Arnaud
authors: A
authors: Leleu
authors: Isabelle
authors: I
authors: Paul
authors: Heidi
authors: H
authors: Charvin
authors: Christian
authors: C
authors: Bernard
authors: Robert
authors: R
authors: Lalonde
authors: Mohamed
authors: M
authors: Rebaï
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology*; D001931:Brain Mapping; D004192:Discrimination, Psychological / Q000502:physiology*; D004569:Electroencephalography; D018913:Event-Related Potentials, P300 / Q000502:physiology; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009415:Nerve Net / Q000033:anatomy & histology / Q000502:physiology; D009483:Neuropsychological Tests; D010296:Parietal Lobe / Q000033:anatomy & histology / Q000502:physiology*; D010775:Photic Stimulation; D017397:Prefrontal Cortex / Q000033:anatomy & histology / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D013997:Time Factors; D013998:Time Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology; D055815:Young Adult