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Related Experiment Video

Updated: Jun 8, 2026

Three Laboratory Procedures for Assessing Different Manifestations of Impulsivity in Rats
09:12

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Published on: March 17, 2019

Nucleus accumbens and impulsivity.

Koray Basar1, Thibaut Sesia, Henk Groenewegen

  • 1Department of Psychiatry, Faculty of Medicine, Hacettepe University, Ankara, Turkey.

Progress in Neurobiology
|September 14, 2010
PubMed
Summary
This summary is machine-generated.

The nucleus accumbens (NAc) plays a key role in regulating impulsivity, with its core and shell subregions differentially affecting behavior. Neurotransmitter activity, particularly dopamine, influences NAc function and impulsivity.

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Area of Science:

  • Neuroscience
  • Behavioral Science

Background:

  • Impulsivity is a complex behavior influenced by various neural processes.
  • The nucleus accumbens (NAc) is a critical brain region implicated in regulating impulsivity.

Purpose of the Study:

  • To review findings from animal lesion studies and human functional imaging studies on the NAc's role in impulsivity.
  • To explore how different subregions of the NAc (core and shell) are involved in various facets of impulsivity.

Main Methods:

  • Review of animal lesion studies investigating the NAc's role in intertemporal choice and probability-based decision-making.
  • Analysis of human functional imaging studies examining NAc involvement in impulsive choice.
  • Examination of studies on neurotransmitter modulation (e.g., dopamine) and neurochemical/electrical stimulation effects on NAc function and behavior.

Main Results:

  • The NAc's involvement in impulsivity varies depending on the specific facet of impulsivity and its subregions (core vs. shell).
  • Lesions in the NAc core facilitated impulsivity in intertemporal choice tasks but promoted risk aversion in probability-based tasks.
  • Functional imaging suggests ventral striatum/NAc involvement in impulsive choice, with neurochemical and stimulation studies altering response inhibition.

Conclusions:

  • The NAc, through its distinct subregions and modulated neurotransmitter activity, significantly impacts individual differences in impulsivity.
  • While crucial, the NAc is not the sole neural substrate for all aspects of impulsivity.