Stopping, goal-conflict, trait anxiety and frontal rhythmic power in the stop-signal task.
Cogn Affect Behav Neurosci
; 11(4): 485-93, 2011 Dec.
Article
em En
| MEDLINE
| ID: mdl-21647572
ABSTRACT
The medial right frontal cortex is implicated in fast stopping of an initiated motor action in the stop-signal task (SST). To assess whether this region is also involved in the slower behavioural inhibition induced by goal conflict, we tested for effects of goal conflict (when stop and go tendencies are balanced) on low-frequency rhythms in the SST. Stop trials were divided, according to the delays at which the stop signal occurred, into short-, intermediate-, and long-delay trials. Consistent with goal-conflict processing, intermediate-delay trials were associated with greater 7-8 Hz EEG power than short- or long-delay trials at medial right frontal sites (Fz, F4, and F8). At F8, 7-8 Hz power was linked to high trait anxiety and neuroticism. A separate 4-7 Hz power increase was also seen in stop, relative to go, trials, but this was independent of delay, was maximal at the central midline site Cz, and predicted faster stopping. Together with previous data on the SST, these results suggest that the right frontal region could be involved in multiple inhibition mechanisms. We propose a hierarchical model of the control of stopping that integrates the literature on the neural control of fast motor stopping with that on slower, motive-directed behavioural inhibition.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ansiedade
/
Córtex Pré-Frontal
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Conflito Psicológico
/
Objetivos
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Inibição Psicológica
Tipo de estudo:
Prognostic_studies
Limite:
Adult
/
Female
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Humans
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Male
Idioma:
En
Revista:
Cogn Affect Behav Neurosci
Assunto da revista:
CIENCIAS DO COMPORTAMENTO
/
NEUROLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Nova Zelândia