Citation

Liu P, Cao R, Chen X, Wang Y. Brain Res. 2017; 1664: 63-73.

Affiliation

Key Laboratory of Behavior & Cognitive Neuroscience in Shaanxi Province, School of Psychology, Shaanxi Normal University, Xi'an, China.

Copyright

(Copyright © 2017, International Brain Research Organization, Publisher Elsevier Publishing)

DOI

10.1016/j.brainres.2017.03.025

PMID

28365315

Abstract

Previous studies have identified an interference effect from dangerous objects on prepared responses. However, its origin remains arguable. This study investigated the neural processes of this motor interference effect. The design adopted a motor priming paradigm mixed with a Go/NoGo task. Pictures of a left or right hand were used as primes, and green (Go signal) or red (NoGo signal) circles superimposed on dangerous or safe objects were used as targets. Participants were instructed to prepare the corresponding key press using the hand that was consistent with the handedness of the prime and not to execute until a Go signal appeared. Behavioral results indicated longer reaction times and a trend that participants made more errors for the dangerous condition than for the safe condition in the Go trials. However, the difference between the error rates for the dangerous and safe conditions did not emerge in the NoGo trials. Event-related potential analysis revealed a similar effect on the P3 component, which may reflect an assignment of cognitive resources to evaluate danger. More positive parietal P3 amplitudes were identified in response to the dangerous condition in the Go trials. However, the difference in the P3 amplitudes between the dangerous and safe conditions was not significant in the NoGo trials. Thus, the motor interference effect from dangerous objects may originate from the danger evaluations. Furthermore, differences between the dangerous and safe conditions also emerged in the P1, posterior N1, P2, and posterior N2 components; the possible processes that underlie these components were discussed.

Copyright © 2017 Elsevier B.V. All rights reserved.

Language: en

Keywords

Dangerous objects; Go/NoGo task; Motor interference effect; Motor priming paradigm; parietal P3