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Brain Structure and Function
Erschienen in: Brain Structure and Function 5/2016

20.05.2015 | Original Article

Individual variation in the neural processes of motor decisions in the stop signal task: the influence of novelty seeking and harm avoidance personality traits

verfasst von: Jianping Hu, Dianne Lee, Sien Hu, Sheng Zhang, Herta Chao, Chiang-shan R. Li

Erschienen in: Brain Structure and Function | Ausgabe 5/2016

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Abstract

Personality traits contribute to variation in human behavior, including the propensity to take risk. Extant work targeted risk-taking processes with an explicit manipulation of reward, but it remains unclear whether personality traits influence simple decisions such as speeded versus delayed responses during cognitive control. We explored this issue in an fMRI study of the stop signal task, in which participants varied in response time trial by trial, speeding up and risking a stop error or slowing down to avoid errors. Regional brain activations to speeded versus delayed motor responses (risk-taking) were correlated to novelty seeking (NS), harm avoidance (HA) and reward dependence (RD), with age and gender as covariates, in a whole brain regression. At a corrected threshold, the results showed a positive correlation between NS and risk-taking responses in the dorsomedial prefrontal, bilateral orbitofrontal, and frontopolar cortex, and between HA and risk-taking responses in the parahippocampal gyrus and putamen. No regional activations varied with RD. These findings demonstrate that personality traits influence the neural processes of executive control beyond behavioral tasks that involve explicit monetary reward. The results also speak broadly to the importance of characterizing inter-subject variation in studies of cognition and brain functions.
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Metadaten
Titel
Individual variation in the neural processes of motor decisions in the stop signal task: the influence of novelty seeking and harm avoidance personality traits
verfasst von
Jianping Hu
Dianne Lee
Sien Hu
Sheng Zhang
Herta Chao
Chiang-shan R. Li
Publikationsdatum
20.05.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Brain Structure and Function / Ausgabe 5/2016
Print ISSN: 1863-2653
Elektronische ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-015-1061-4

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