Document Detail


Neurobiology of the structure of personality: dopamine, facilitation of incentive motivation, and extraversion.
MedLine Citation:
PMID:  11301519     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Extraversion has two central characteristics: (1) interpersonal engagement, which consists of affiliation (enjoying and valuing close interpersonal bonds, being warm and affectionate) and agency (being socially dominant, enjoying leadership roles, being assertive, being exhibitionistic, and having a sense of potency in accomplishing goals) and (2) impulsivity, which emerges from the interaction of extraversion and a second, independent trait (constraint). Agency is a more general motivational disposition that includes dominance, ambition, mastery, efficacy, and achievement. Positive affect (a combination of positive feelings and motivation) is closely associated with extraversion. Extraversion is accordingly based on positive incentive motivation. Parallels between extraversion (particularly its agency component) and a mammalian behavioral approach system based on positive incentive motivation implicate a neuroanatomical network and modulatory neurotransmitters in the processing of incentive motivation. A corticolimbic-striatal-thalamic network (1) integrates the salient incentive context in the medial orbital cortex, amygdala, and hippocampus; (2) encodes the intensity of incentive stimuli in a motive circuit composed of the nucleus accumbens, ventral pallidum, and ventral tegmental area dopamine projection system; and (3) creates an incentive motivational state that can be transmitted to the motor system. Individual differences in the functioning of this network arise from functional variation in the ventral tegmental area dopamine projections, which are directly involved in coding the intensity of incentive motivation. The animal evidence suggests that there are three neurodevelopmental sources of individual differences in dopamine: genetic, "experience-expectant," and "experience-dependent." Individual differences in dopamine promote variation in the heterosynaptic plasticity that enhances the connection between incentive context and incentive motivation and behavior. Our psychobiological threshold model explains the effects of individual differences in dopamine transmission on behavior, and their relation to personality traits is discussed.
Authors:
R A Depue; P F Collins
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.; Review    
Journal Detail:
Title:  The Behavioral and brain sciences     Volume:  22     ISSN:  0140-525X     ISO Abbreviation:  Behav Brain Sci     Publication Date:  1999 Jun 
Date Detail:
Created Date:  2001-04-13     Completed Date:  2001-04-26     Revised Date:  2014-03-25    
Medline Journal Info:
Nlm Unique ID:  7808666     Medline TA:  Behav Brain Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  491-517; discussion 518-69     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Dopamine / metabolism,  physiology*
Extraversion (Psychology)*
Humans
Individuality
Models, Neurological
Motivation*
Neural Pathways
Neurobiology*
Personality / genetics,  physiology*
Reward
Grant Support
ID/Acronym/Agency:
MH 17069/MH/NIMH NIH HHS; MH 48114/MH/NIMH NIH HHS; MH 55347/MH/NIMH NIH HHS
Chemical
Reg. No./Substance:
VTD58H1Z2X/Dopamine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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