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Prefrontal cortical dysfunction in abstinent cocaine abusers.

Karen Bolla1, Monique Ernst, Kent Kiehl

  • 1Department of Neurology, Johns Hopkins University School of Medicine, 4940 Eastern Avenue, Baltimore, Maryland 21224, USA. kbolla@jhmi.edu

The Journal of Neuropsychiatry and Clinical Neurosciences
|December 24, 2004
PubMed
Summary
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Cocaine abusers exhibit altered brain activity in executive function regions, specifically the anterior cingulate cortex (ACC) and lateral prefrontal cortex (LPFC). This dysfunction may hinder addiction recovery efforts.

Area of Science:

  • Neuroscience
  • Addiction Research
  • Cognitive Neuroscience

Background:

  • The anterior cingulate cortex (ACC) and lateral prefrontal cortex (LPFC) are crucial for executive cognitive functions (ECF).
  • Substance abuse, particularly cocaine addiction, is known to affect cognitive abilities.
  • Understanding brain function alterations in abstinent individuals is key to addressing addiction.

Purpose of the Study:

  • To investigate the functional differences in the ACC and LPFC between cocaine abusers and non-drug-using individuals.
  • To correlate cocaine use severity with brain activity in these executive function regions.

Main Methods:

  • Utilized positron emission tomography (PET) with H(2)(15)O to measure brain activity.
  • Employed a modified Stroop Task to assess executive cognitive functions.

Related Experiment Videos

  • Studied 23-day abstinent cocaine abusers and a comparison group.

    • Main Results:

    • Cocaine abusers showed reduced activation in the left ACC and right LPFC compared to controls.
    • Greater activation was observed in the right ACC among cocaine abusers.
    • Weekly cocaine consumption negatively correlated with activity in the rostral ACC and right LPFC.

    Conclusions:

    • Abstinent cocaine abusers display significant alterations in ACC and LPFC function, impacting executive cognitive functions.
    • These neurobiological changes may impede efforts to cease drug use and undermine treatment efficacy.
    • Findings suggest that impaired ECF is a common feature in addiction and potentially other neuropsychiatric disorders.