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ERP correlates of response inhibition after-effects in the stop signal task

Upton, DJ and Enticott, PG and Croft, RJ and Cooper, NR and Fitzgerald, PB (2010) 'ERP correlates of response inhibition after-effects in the stop signal task.' Experimental Brain Research, 206 (4). 351 - 358. ISSN 0014-4819

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Abstract

Several studies have found that response inhibition in the stop signal task is associated with a delay in subsequent response speed, which may result from the automatic retrieval of a conflicting stimulus-goal association. This study investigated the neurophysiological correlates of this sequence effect using event related potentials (ERPs). ERPs were recorded in 17 healthy people while they performed the stop signal task. We found reduced P3b amplitude for responses following successful inhibition, but only when the stimulus was repeated from the previous trial (repetition-after-effects). For responses following failed inhibition, P3b amplitude was reduced regardless of stimulus repetition status. We also found a general increase in frontal N2 amplitude on response trials following inhibition, regardless of stimulus repetition or behavioural slowing. The complex pattern of ERP findings, dependent on stimulus repetition and success of inhibition, suggests multiple sources of behavioural slowing in the present data. ERP findings suggest that a memory retrieval processes underlies the repetition component of inhibition after effects. These findings are considered within the broader context of ERP findings in the negative priming literature. © 2010 Springer-Verlag.

Item Type: Article
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculty of Science and Health > Psychology, Department of
Depositing User: Jim Jamieson
Date Deposited: 29 Nov 2011 11:05
Last Modified: 05 Feb 2019 20:15
URI: http://repository.essex.ac.uk/id/eprint/1642

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