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

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Published on: March 17, 2019

Impulsivity and the 5-HTTLPR polymorphism in a non-clinical sample.

Guilherme M Lage1, Leandro F Malloy-Diniz, Lorena O Matos

  • 1College of Human, Social and Health Sciences, FUMEC University, Belo Horizonte, Minas Gerais, Brazil. menezeslage@gmail.com

Plos One
|March 10, 2011
PubMed
Summary
This summary is machine-generated.

The serotonin transporter gene (5-HTTLPR) polymorphism showed no significant link to impulsivity components in healthy adults. This suggests neuropsychological tests may lack sensitivity in non-clinical samples.

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychology

Background:

  • Impulsivity is linked to serotonin system function.
  • The serotonin transporter gene promoter region polymorphism (5-HTTLPR) role in impulsivity is understudied in non-clinical groups.

Purpose of the Study:

  • To investigate the association between the 5-HTTLPR polymorphism and different impulsivity components in a non-clinical population.

Main Methods:

  • 127 healthy participants completed neuropsychological tests (Continuous Performance Task, Iowa Gambling Task) to assess motor, attentional, and non-planning impulsivity.
  • Participants were genotyped for 5-HTTLPR and analyzed by genotype and gender.

Main Results:

  • No significant differences in attentional, motor, or non-planning impulsivity scores were found between different 5-HTTLPR genotype groups.
  • The study did not find a significant association between 5-HTTLPR genotype and impulsivity subsets.

Conclusions:

  • 5-HTTLPR genotype is not significantly associated with impulsivity subsets in a non-clinical sample using these neuropsychological tests.
  • Findings highlight potential limitations in neuropsychological test sensitivity for detecting impulsivity in non-clinical populations.
  • The influence of gender and race on the 5-HTTLPR-impulsivity relationship warrants further investigation.