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Impulsivity trait and proactive cognitive control: An fMRI study.

Gioele Gavazzi1, Arianna Rossi2, Stefano Orsolini3

  • 1IRCCS SDN, Napoli, Italy.

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|December 15, 2018
PubMed
Summary
This summary is machine-generated.

Motor impulsivity is linked to altered brain activity during movement preparation. Higher impulsivity correlates with less inhibition in sensorimotor areas and increased parietal lobe activation, suggesting compensatory control mechanisms.

Keywords:
fMRIalertnessimpulsivityproactive inhibitionsensorimotor

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Behavioral Science

Background:

  • Cognitive control is essential for regulating behavior.
  • Proactive inhibitory control balances alertness during movement preparation.
  • Motor impulsivity may disrupt this balance, leading to response inhibition failures.

Purpose of the Study:

  • To investigate the neural correlates of motor impulsivity during movement preparation.
  • To examine the relationship between motor impulsivity and proactive inhibitory control.

Main Methods:

  • 36 young adults completed the Barratt Impulsiveness Scale.
  • Functional magnetic resonance imaging (fMRI) was used during a Go/Nogo task.
  • Brain activity was analyzed during the 'readiness' period of movement preparation.

Main Results:

  • A positive correlation was found between motor impulsivity scores and activation in left sensorimotor cortices.
  • This suggests potential disinhibition of the motor system in individuals with high motor impulsivity.
  • Increased activation in the left inferior and superior parietal lobule correlated with motor impulsivity, possibly indicating a compensatory control mechanism.

Conclusions:

  • Motor impulsivity trait is associated with altered neural activity during movement preparation.
  • Findings suggest a disinhibition of the motor system and potential compensatory mechanisms in the parietal cortex.
  • Further research is warranted to understand proactive control in impulsive individuals and clinical conditions.