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Value-based decision-making of cigarette and nondrug rewards in dependent and occasional cigarette smokers: An FMRI study.

Abstract：

:Little is known about the neural functioning that underpins drug valuation and choice in addiction, including nicotine dependence. Following ad libitum smoking, 19 dependent smokers (smoked≥10/day) and 19 occasional smokers (smoked 0.5-5/week) completed a decision-making task. First, participants stated how much they were willing-to-pay for various amounts of cigarettes and shop vouchers. Second, during functional magnetic resonance imaging, participants decided if they wanted to buy these cigarettes and vouchers for a set amount of money. We examined decision-making behaviour and brain activity when faced with cigarette and voucher decisions, purchasing (vs not purchasing) cigarettes and vouchers, and "value signals" where brain activity correlated with cigarette and voucher value. Dependent smokers had a higher willingness-to-pay for cigarettes and greater activity in the bilateral middle temporal gyrus when faced with cigarette decisions than occasional smokers. Across both groups, the decision to buy cigarettes was associated with activity in the left paracingulate gyrus, right nucleus accumbens, and left amygdala. The decision to buy vouchers was associated with activity in the left superior frontal gyrus, but dependent smokers showed weaker activity in the left posterior cingulate gyrus than occasional smokers. Across both groups, cigarette value signals were observed in the left striatum and ventromedial prefrontal cortex. To summarise, nicotine dependence was associated with greater behavioural valuation of cigarettes and brain activity during cigarette decisions. When purchasing cigarettes and vouchers, reward and decision-related brain regions were activated in both groups. For the first time, we identified value signals for cigarettes in the brain.

journal_name

Addict Biol

journal_title

Addiction biology

authors

Lawn W,Mithchener L,Freeman TP,Benattayallah A,Bisby JA,Wall MB,Dodds CM,Curran HV,Morgan CJA

doi

10.1111/adb.12802

subject

Has Abstract

pub_date

2020-07-01 00:00:00

pages

e12802

issue

eissn

1355-6215

issn

1369-1600

journal_volume

pub_type

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Value-based decision-making of cigarette and nondrug rewards in dependent and occasional cigarette smokers: An FMRI study.