Rachel Victoria Kozink

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RATIONALE Exposure to smoking-related cues can trigger relapse in smokers attempting to maintain abstinence. OBJECTIVES In the present study, we evaluated the effect of 24-h smoking abstinence on brain responses to smoking-related cues using functional magnetic resonance imaging (fMRI). MATERIALS AND METHODS Eighteen adult smokers underwent fMRI(More)
Exposure to smoking cues increases craving for cigarettes and can precipitate relapse. Whereas brain imaging studies have identified a distinct network of brain regions subserving the processing of smoking cues, little is known about the influence of individual difference factors and withdrawal symptoms on brain cue reactivity. Multiple regression analysis(More)
BACKGROUND Although functional brain imaging has established that individuals with unipolar major depressive disorder (MDD) are characterized by frontostriatal dysfunction during reward processing, no research to date has examined the chronometry of neural responses to rewards in euthymic individuals with a history of MDD. METHOD A monetary incentive(More)
Acute nicotine abstinence is associated with disruption of executive function and reward processes; however, the neurobiological basis of these effects has not been fully elucidated. The effects of nicotine abstinence on brain function during reward-based probabilistic decision making were preliminarily investigated by scanning adult smokers (n = 13)(More)
Among nicotine-dependent smokers, smoking abstinence disrupts multiple cognitive and affective processes including conflict resolution and emotional information processing (EIP). However, the neurobiological basis of abstinence effects on resolving emotional interference on cognition remains largely uncharacterized. In this study, functional magnetic(More)
Smokers exhibit decrements in inhibitory control (IC) during withdrawal. The objective of this study was to investigate the neural basis of these effects in critical substrates of IC--right inferior frontal cortex (rIFC) and presupplementary motor area (pre-SMA). Smokers were scanned following smoking as usual and after 24-h smoking abstinence. During(More)
RATIONALE A dopamine receptor 4 variable number tandem repeat (DRD4 VNTR) polymorphism has been related to reactivity to smoking cues among smokers, but the effect of this genetic variation on brain responses to smoking cues has not been evaluated. OBJECTIVES The present study evaluated the relationship between carrying the DRD4 VNTR 7-repeat allele and(More)
Trait impulsivity and response inhibition have been shown to be related to smoking behavior. One measure of response inhibition - antisaccade performance, or the ability to inhibit looking at a novel stimulus - has been shown to be worsened by smoking abstinence, improved by nicotine administration and predictive of smoking cessation outcomes. However,(More)
RATIONALE Compared to nonsmokers, smokers exhibit a number of potentially important differences in regional brain structure including reduced gray matter (GM) volume and/or density in areas including frontal and cingulate cortices, thalamus, and insula. However, associations between brain structure and smoking cessation treatment outcomes have not been(More)
Smoking withdrawal is associated with significant deficits in the ability to initiate and maintain attention for extended periods of time (i.e. sustained attention; SA). However, the effects of smoking abstinence on the temporal dynamics of neurocognition during SA have not been evaluated. Twenty adult smokers underwent functional magnetic resonance imaging(More)