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Review
.2013 Sep:108:44-79.
doi: 10.1016/j.pneurobio.2013.06.005. Epub 2013 Jul 13.

Inhibition and impulsivity: behavioral and neural basis of response control

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Review

Inhibition and impulsivity: behavioral and neural basis of response control

Andrea Bari et al. Prog Neurobiol.2013 Sep.

Abstract

In many circumstances alternative courses of action and thoughts have to be inhibited to allow the emergence of goal-directed behavior. However, this has not been the accepted view in the past and only recently has inhibition earned its own place in the neurosciences as a fundamental cognitive function. In this review we first introduce the concept of inhibition from early psychological speculations based on philosophical theories of the human mind. The broad construct of inhibition is then reduced to its most readily observable component which necessarily is its behavioral manifestation. The study of 'response inhibition' has the advantage of dealing with a relatively simple and straightforward process, the overriding of a planned or already initiated action. Deficient inhibitory processes profoundly affect everyday life, causing impulsive conduct which is generally detrimental for the individual. Impulsivity has been consistently linked to several types of addiction, attention deficit/hyperactivity disorder, mania and other psychiatric conditions. Our discussion of the behavioral assessment of impulsivity will focus on objective laboratory tasks of response inhibition that have been implemented in parallel for humans and other species with relatively few qualitative differences. The translational potential of these measures has greatly improved our knowledge of the neurobiological basis of behavioral inhibition and impulsivity. We will then review the current models of behavioral inhibition along with their expression via underlying brain regions, including those involved in the activation of the brain's emergency 'brake' operation, those engaged in more controlled and sustained inhibitory processes and other ancillary executive functions.

Keywords: 3,4-methylenedioxy-N-methylamphetamine; 5-CSRTT; 5-HT; 5-choice serial reaction time task; ACC; ADHD; BA; Brodmann area; DA; DNAB; DRD2; Delay discounting; ERP; FEF; Go/no-go; IFC; IFG; IFJ; Impulsivity; Inhibition; LC; M1; MDMA; MRI; NE; OCD; OFC; PFC; Pre-SMA; RT; Reversal learning; SMA; SSD; SSRI; SSRT; SST; STN; Stop-signal task; anterior cingulate cortex; attention deficit/hyperactivity disorder; dopamine; dopamine receptor 2 gene; dorsal noradrenergic bundle; event-related potentials; frontal eye field; inferior frontal cortex; inferior frontal gyrus; inferior frontal junction; locus coeruleus; magnetic resonance imaging; motor area 1; norepinephrine; obsessive-compulsive disorder; orbitofrontal cortex; pre-supplementary motor area; prefrontal cortex; reaction time; selective serotonin reuptake inhibitor; serotonin; stop-signal delay; stop-signal reaction time; stop-signal task; subthalamic nucleus; supplementary motor area.

Copyright © 2013 Elsevier Ltd. All rights reserved.

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