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Psychophysiology. 2016 Jul;53(7):1008-19. doi: 10.1111/psyp.12647. Epub 2016 Mar 23.

Preventing (impulsive) errors: Electrophysiological evidence for online inhibitory control over incorrect responses.

Author information

1
Aix-Marseille Université, CNRS, LNC UMR 7291, Marseille, France.
2
Department of Psychology, University of Amsterdam, Amsterdam, The Netherlands.
3
Amsterdam Brain & Cognition (ABC), University of Amsterdam, Amsterdam, The Netherlands.

Abstract

In a rich environment, with multiple action affordances, selective action inhibition is critical in preventing the execution of inappropriate responses. Here, we studied the origin and the dynamics of incorrect response inhibition and how it can be modulated by task demands. We used EEG in a conflict task where the probability of compatible and incompatible trials was varied. This allowed us to modulate the strength of the prepotent response, and hence to increase the risk of errors, while keeping the probability of the two responses equal. The correct response activation and execution was not affected by compatibility or by probability. In contrast, incorrect response inhibition in the primary motor cortex ipsilateral to the correct response was more pronounced on incompatible trials, especially in the condition where most of the trials were compatible, indicating a modulation of inhibitory strength within the course of the action. Two prefrontal activities, one medial and one lateral, were also observed before the response, and their potential links with the observed inhibitory pattern observed are discussed.

KEYWORDS:

Current source density; EEG; Response inhibition; Simon task

PMID:
27005956
PMCID:
PMC4949675
DOI:
10.1111/psyp.12647
[Indexed for MEDLINE]
Free PMC Article

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