These included a response inhibition task to assess impulse control and the ability to monitor one’s behavior and an attention task which assessed the ability to avoid distraction from smoking-related images, which tend to elicit an automatic attention response in smokers.
The investigators found that when doing these tasks, the current smokers compared to the never-smokers showed reduced functioning in prefrontal regions that are related to controlling behavior. In addition, the current smokers showed elevated activity in sub-cortical regions such as the nucleus accumbens that respond to the reward value or salience of the nicotine stimuli. However, in marked contrast, the former smokers did not show this sub-cortical activity, but instead showed increased activity in the frontal lobes — the areas that are critically involved in controlling behavior. Moreover, the former smokers were “super-normal”, showing greater levels of activity in these prefrontal regions than the never-smokers.
The implication is that the brain regions responsible for what might be considered “willpower” show more activity in those who have quit smoking. This type of willpower can be measured, can be related to specific brain regions, and would appear to be related to being able to quit cigarettes. These results reinforce the value of smoking cessation therapies that stress the importance of, or that help to train, the cognitive skills involved in exercising control over drug desires.
“Differences in “bottom-up” and “top-down” neural activity in current and former cigarette smokers: Evidence for neural substrates which may promote nicotine abstinence through increased cognitive control” (Liam Nestor, Ella McCabe, Jennifer Jones, Luke Clancy, & Hugh Garavan) is published in NeuroImage.
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How to Quit Smoking
Tired of people asking you to stop smoking around them? Don't want to be ordered around by public smoking bans? Simple steps that help you to quit smoking.
Tired of people asking you to stop smoking around them? Don't want to be ordered around by public smoking bans? Simple steps that help you to quit smoking.
