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Related Experiment Videos

Perfusion MRI and computerized cognitive test abnormalities in abstinent methamphetamine users.

Linda Chang1, Thomas Ernst, Oliver Speck

  • 1Medical Department, Brookhaven National Laboratory, Building 490, Upton, NY, 11973-5000, USA. changl@bnl.gov

Psychiatry Research
|May 31, 2002
PubMed
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Methamphetamine (METH) abstinence is linked to lasting brain blood flow changes and slower cognitive task performance, particularly in working memory. These persistent effects highlight the long-term impact of METH abuse on brain function.

Area of Science:

  • Neuroscience
  • Radiology
  • Psychiatry

Background:

  • Methamphetamine (METH) abuse can lead to long-term neurological and cognitive deficits.
  • Understanding persistent changes in brain function after METH abstinence is crucial for treatment and recovery.

Purpose of the Study:

  • To investigate persistent abnormalities in regional cerebral blood flow (rCBF) and cognitive function in abstinent METH users.
  • To identify specific brain regions affected by chronic METH use and subsequent abstinence.

Main Methods:

  • Perfusion magnetic resonance imaging (pMRI) was used to assess rCBF in 20 abstinent METH users and 20 controls.
  • Neuropsychological tests, including the California Computerized Assessment Package (CalCAP), evaluated cognitive function.

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Main Results:

  • Abstinent METH users exhibited altered rCBF in several brain regions, including decreased flow in the putamen/insular cortices and increased flow in white matter and occipital regions.
  • Gender-specific differences in rCBF were observed, with female METH users showing increased flow and male users showing decreased flow in certain areas.
  • METH users performed within normal ranges on standard tests but were slower on CalCAP tasks, especially those involving working memory.

Conclusions:

  • Methamphetamine abuse is associated with persistent physiological brain changes, even after prolonged abstinence.
  • These neurophysiologic alterations correlate with subtle cognitive impairments, such as slower reaction times in working memory tasks.
  • Findings underscore the lasting impact of METH on brain structure and function, necessitating targeted interventions for recovery.