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Dorsolateral Prefrontal γ-Aminobutyric Acid in Men Predicts Individual Differences in Rash Impulsivity

Frederic Boy Orcid Logo, C. John Evans, Richard A.E. Edden, Andrew D. Lawrence, Krish D. Singh, Masud Husain, Petroc Sumner

Biological Psychiatry, Volume: 70, Issue: 9, Pages: 866 - 872

Swansea University Author: Frederic Boy Orcid Logo

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Abstract

Background: Impulsivity is a multifaceted personality construct associated with numerous psychiatric disorders. Recent research has characterized four facets of impulsivity: “urgency” (the tendency to act rashly especially in the context of distress or cravings); “lack of premeditation” (not envisag...

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Published in: Biological Psychiatry
ISSN: 0006-3223
Published: 2011
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa13371
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Abstract: Background: Impulsivity is a multifaceted personality construct associated with numerous psychiatric disorders. Recent research has characterized four facets of impulsivity: “urgency” (the tendency to act rashly especially in the context of distress or cravings); “lack of premeditation” (not envisaging the consequences of actions); “lack of perseverance” (not staying focused on a task); and “sensation seeking” (engaging in exciting activities). Urgency is particularly associated with clinical populations and problematic disinhibited behavior.Methods: We used magnetic resonance spectroscopy to measure concentration of the inhibitory neurotransmitter -aminobutyric acid (GABA) in the dorsolateral prefrontal cortex (DLPFC) in two cohorts of 12 and 13 participants.Results: WefindthatvariationintraiturgencyinhealthymencorrelateswithGABAconcentrationintheDLPFC.Theresultwasreplicated in an independent cohort. More GABA predicted lower urgency scores, consistent with a role in self-control for GABA-mediated inhibitory mechanisms in DLPFC.Conclusions: These findings help account for individual differences in self-control and thus clarify the relationship between GABA and a wide range of psychiatric disorders associated with impaired self-control.
Keywords: Externalizing, gamma-aminobutyric acid receptor alpha-2 (GABRA2), inhibition, neurochemistry, personality, self-control, stop-signal, urgency
College: College of Human and Health Sciences
Issue: 9
Start Page: 866
End Page: 872