The purpose of this study is to assess neurocognitive and associated neural regions/circuitry disruptions relevant to impulsive relapse in cocaine-addicted subjects, and the relationship of the cognitive and neural mechanisms of impulsivity/decision-making to relapse style.
This study is designed to explore putative differences in impulsive behaviors and decision making in cocaine-addicted and healthy control subjects using functional magnetic resonance imaging (fMRI), single photon emission tomography (SPECT), and neurocognitive tasks. We predict that cocaine-addicted subjects will demonstrate neurocognitive and neural alterations in measures of impulsivity and decision-making when compared to healthy controls. That is, cocaine-addicted subjects will show both decreased activation and decreased resting measures of regional cerebral blood flow (rCBF) of the brain structures associated with impulsivity and decision-making. Furthermore, neurocognitive and neural deficits associated with impulsivity and decision-making will be associated with each other and with measures indicative of an impulsive relapse and altered decision making.
Study Type
OBSERVATIONAL
Enrollment
90
UT Southwestern Medical Center at Dallas, Divison on Addictions
Dallas, Texas, United States
Determine if the brain regions involved in inhibition and decision-making are altered in cocaine-addicted subjects compared to healthy controls.
Time frame: 2 weeks
In cocaine-addicted subjects, determine if neural deficits during disinhibition or decision-making are related to relapse following treatment.
Time frame: 6 months
Assess the predictive validity of self-report measures of impulsive relapse.
Time frame: 6 months
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