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Published on: August 6, 2013
Cue reactivity in smokers: an event-related potential study
Erika Litvin Bloom1, Geoffrey F Potts, David E Evans
1Alpert Medical School of Brown University, Department of Psychiatry and Human Behavior, United States; University of South Florida, Department of Psychology, United States; Moffitt Cancer Center, Tobacco Research and Intervention Program, United States.
Smokers exhibited behavioral cue reactivity to cigarette images but showed no significant differences in brain activity (P2a and P3 event-related potentials) compared to non-smokers. This suggests behavioral responses to smoking cues may not always align with neural salience processing.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Addiction Research
Background:
- Drug-use sensitization of the dopaminergic (DA) system may heighten attention to drug-related cues.
- Event-related potentials (ERPs) can assess attention to smoking cues, but a component linked to DA-mediated salience evaluation has not been extensively studied.
Purpose of the Study:
- To compare the DA-related P2a and P3 ERP components in smokers and non-smokers during a cue exposure task.
- To investigate if smokers exhibit differential neural responses to non-target cigarette images, reflecting heightened salience.
Main Methods:
- Compared ERPs (P2a, P3) in 21 smokers and 21 non-smokers during a task with cigarette and neutral images.
- Assessed behavioral responses, including false alarms, to assess cue reactivity.
Main Results:
- Smokers demonstrated behavioral cue reactivity, with more false alarms to cigarette images than non-smokers.
- Both smokers and non-smokers showed larger P2a and P3 amplitudes to cigarette images compared to neutral images.
- No significant group differences in P2a or P3 amplitudes were observed for cigarette images, despite behavioral differences.
Conclusions:
- Smokers' behavioral cue reactivity to smoking stimuli was evident, but this was not mirrored by differential brain activity in the assessed ERP components.
- The findings suggest that behavioral and neural responses to smoking cues may dissociate, potentially due to factors like ERP characteristics, sample traits, or study design.
