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| Research article summary (published 22 Dec 2008): |
Mental fatigue and impaired response processes: event-related brain potentials in a Go/NoGo task.
Full Abstract
The effects of mental fatigue on the availability of cognitive resources and associated response-related processes were examined using event-related brain potentials. Subjects performed a Go/NoGo task for 60 min. Reaction time, number of errors, and mental fatigue scores all significantly increased with time spent on the task. The NoGo-P3 amplitude significantly decreased with time on task, but the Go-P3 amplitude was not modulated. The amplitude of error-related negativity (Ne/ERN) also decreased with time on task. These results indicate that mental fatigue attenuates resource allocation and error monitoring for NoGo stimuli. The Go- and NoGo-P3 latencies both increased with time on task, indicative of a delay in stimulus evaluation time due to mental fatigue. NoGo-N2 latency increased with time on task, but NoGo-N2 amplitude was not modulated. The amplitude of response-locked lateralized readiness potential (LRP) significantly decreased with time on task. Mental fatigue appears to slows down the time course of response inhibition, and impairs the intensity of response execution.
Author information
Author/s: Kato, Yuichiro (Y); Endo, Hiroshi (H); Kizuka, Tomohiro (T);
Affiliation: Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan. kidkato(-atsign-)ni.aist.go.jp
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: International journal of psychophysiology : official journal of the International Organization of Psychophysiology (Int J Psychophysiol), published in Netherlands. (Language: eng)
Reference: 2009-May; vol 72 (issue 2) : pp 204-11
Dates: Created 2009/04/27; Completed 2009/07/02;
PMID: 19135100, status: MEDLINE (last retrieval date: 7/2/2009, IMS Date: 02 Jul 2009 00:00:00)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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