title: Conditioned cortical reactivity to cues predicting cigarette-related or pleasant images.
abstract: Through Pavlovian conditioning, reward-associated neutral stimuli can acquire incentive salience and motivate complex behaviors. In smokers, cigarette-associated cues may induce cravings and trigger smoking. Understanding the brain mechanisms underlying conditioned responses to cigarette-associated relative to other inherently pleasant stimuli might contribute to the development of more effective smoking cessation treatments that emphasize the rehabilitation of reward circuitry. Here we measured brain responses to geometric patterns (the conditioned stimuli, CSs) predicting cigarette-related, intrinsically pleasant and neutral images (the unconditioned stimuli, USs) using event-related potentials (ERPs) in 29 never-smokers, 20 nicotine-deprived smokers, and 19 non-deprived smokers. Results showed that during US presentation, cigarette-related and pleasant images prompted higher cortical positivity than neutral images over centro-parietal sensors between 400 and 800ms post-US onset (late positive potential, LPP). The LPP evoked by pleasant images was significantly larger than the LPP evoked by cigarette images. During CS presentation, ERPs evoked by geometric patterns predicting pleasant and cigarette-related images had significantly larger amplitude than ERPs evoked by CSs predicting neutral images. These effects were maximal over right parietal sites between 220 and 240ms post-CS onset and over occipital and frontal sites between 308 and 344ms post-CS onset. Smoking status did not modulate these effects. Our results show that stimuli with no intrinsic reward value (e.g., geometric patterns) may acquire rewarding properties through repeated pairings with established reward cues (i.e., cigarette-related, intrinsically pleasant).
authors.affiliation: The University of Texas MD Anderson Cancer Center,P.O Box 301439, Unit 1330, Houston, TX 77230, USA. Electronic address: emdeweese@mdanderson.org.
authors.forename: Menton M
authors.initials: MM
authors.lastname: Deweese
authors.affiliation: The University of Texas MD Anderson Cancer Center,P.O Box 301439, Unit 1330, Houston, TX 77230, USA. Electronic address: jdrobinson@mdanderson.org.
authors.forename: Jason D
authors.initials: JD
authors.lastname: Robinson
authors.affiliation: The University of Texas MD Anderson Cancer Center,P.O Box 301439, Unit 1330, Houston, TX 77230, USA. Electronic address: pcinciri@mdanderson.org.
authors.forename: Paul M
authors.initials: PM
authors.lastname: Cinciripini
authors.affiliation: The University of Texas MD Anderson Cancer Center,P.O Box 301439, Unit 1330, Houston, TX 77230, USA. Electronic address: fversace@mdanderson.org.
authors.forename: Francesco
authors.initials: F
authors.lastname: Versace
mesh_terms: D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology*; D003213:Conditioning, Psychological / Q000502:physiology*; D003463:Cues; D005260:Female; D005544:Forecasting; D006801:Humans; D008297:Male; D008875:Middle Aged; D010775:Photic Stimulation / Q000379:methods*; D057566:Self Report; D012907:Smoking / Q000523:psychology*; D062789:Tobacco Products
keywords: ERP; Emotion; Event related potentials; Higher-order conditioning; LPP; Nicotine dependence; Smoking
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