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Neural substrates of substance use disorders.

Martin P Paulus1

  • 1Laureate Institute for Brain Research, Tulsa, Oklahoma, USA.

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Neuroimaging reveals brain imbalances in substance use disorders, specifically in executive control and salience processing. Further research with larger groups is needed to understand these brain-behavior relationships.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Brain Imaging

Background:

  • Substance use disorders (SUDs) represent a significant societal burden.
  • Understanding the neural basis of SUDs is crucial for developing effective treatments.
  • Neuroimaging offers insights into brain alterations associated with SUDs.

Purpose of the Study:

  • To review recent neuroimaging findings in individuals with substance use disorders.
  • To summarize the current understanding of the brain basis of SUDs.

Main Methods:

  • Review of resting-state functional connectivity studies.
  • Analysis of structural neuroimaging findings.
  • Examination of longitudinal and meta-analysis studies.

Main Results:

  • Functional connectivity disruptions are observed for various substances, impacting executive control.
  • Structural neuroimaging indicates reduced subcortical volumes, potentially influenced by pre-existing factors and substance use.
  • Meta-analyses suggest dysregulation in cortical control over subcortical salience processing.

Conclusions:

  • Evidence points to an imbalance between brain structures involved in executive control and salience processing in SUDs.
  • Small brain-behavior relationships necessitate larger, prospective studies for deeper understanding.
  • Further research is required to elucidate the neural processes underlying SUDs.