Diffusion Tensor Imaging in MDMA Users and Controls: Association with Decision Making
The American Journal of Drug and Alcohol Abuse – January 01, 2007
Source: OpenAlex
Summary
MDMA users exhibited notable changes in brain structure, specifically a smaller longitudinal diffusivity (lambda(1)) in the rostral body of the corpus callosum compared to 20 healthy controls. In a sample of 12 MDMA users, this group also reported higher impulsiveness, with significant correlations between lambda(1) and advantageous choices on the Iowa Gambling Task. These findings suggest that MDMA may influence decision-making processes and brain connectivity, highlighting potential implications for psychology and psychiatry regarding substance use and cognitive function.
Abstract
Diffusion Tensor Imaging (DTI) may provide information regarding effects of 3,4-methylenedioxymethamphetamine (MDMA) use on brain structure. Twelve MDMA users and 20 healthy controls underwent whole brain DTI data acquisition. Fractional anisotropy (FA), mean diffusivity (D(av)), and longitudinal (lambda(1)) and transverse (lambda(T)) diffusivities were compared between MDMA users and controls in 6 regions of the corpus callosum. MDMA users also completed the Barratt Impulsiveness Scale (BIS), and a subset of subjects completed the Iowa Gambling Task (IGT). Results showed significantly smaller lambda(1) in the rostral body of the corpus callosum in MDMA users, with no differences between groups on lambda(T), FA, or D(av). MDMA users also had a significantly higher BIS nonplanning score and greater preference for disadvantageous choices on the IGT. There was a significant positive correlation between lambda(1) in the rostral body of the corpus callosum and advantageous choices on the IGT. Further research on the etiology of these findings is warranted.