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Updated: May 31, 2026
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A Protocol for Measuring Cue Reactivity in a Rat Model of Cocaine Use Disorder
Published on: June 18, 2018
Elevated gray and white matter densities in cocaine abstainers compared to current users
Colleen A Hanlon1, Darin L Dufault, Michael J Wesley
1Department of Physiology and Pharmacology, Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157-1083, USA. hanlon@musc.edu
Psychopharmacology
|June 22, 2011
Summary
Cocaine abstinence may restore neural tissue density, particularly in the neocortex, and improve cognitive function. This suggests that remaining abstinent for at least one month positively impacts brain structure and cognition in former cocaine users.
Area of Science:
- Neuroimaging
- Cognitive Neuroscience
- Addiction Research
Background:
- Chronic cocaine use is associated with reduced neural tissue density, potentially leading to cognitive deficits.
- Previous neuroimaging studies highlight structural brain changes in active cocaine users.
Purpose of the Study:
- To investigate neural tissue density in individuals abstinent from cocaine.
- To determine the relationship between abstinence duration, neural tissue density, and cognitive performance.
- To compare brain structure and cognition across active users, abstainers, and controls.
Main Methods:
- Voxel-based morphometry (VBM) MRI analysis was used.
- Cognitive assessment battery administered to all participants.
- Study included 24 active cocaine users, 24 abstainers (≥1 month), and 25 matched controls.
Main Results:
- Abstainers showed higher neocortical gray matter density than active users.
- Subcortical gray matter density was reduced in both users and abstainers compared to controls.
- Abstainers performed better on cognitive tasks and showed correlations between cortical density and memory/reaction time.
Conclusions:
- One month of cocaine abstinence is linked to improved neocortical density and cognitive function.
- Findings suggest a potential for neural recovery with abstinence.
- Longitudinal studies are recommended to confirm the interplay between abstinence, cognition, and brain structure.
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