title: Overnight deprivation from smoking disrupts amygdala responses to fear.
abstract: Cigarette smoking, a major, yet avoidable, cause of disability and premature death, is the most prevalent form of nicotine addiction. An emerging theme in the neurobiology of nicotine addiction is the integrity of the amygdala. Using functional MRI, amygdala responses during a face perception task were compared between 28 chronic smokers [14 females, 14 males; age, 26.3 (2.8) years; age at onset of smoking, 15.8 (2.6) years; years smoked, 9.1 (2.1); cigarettes per day, 17.1 (3.7); Fagerström test for nicotine dependence score, 4.1 (1.9); exhaled carbon-monoxide level, 17.8 (9.5) ppm] and 28 age- and education-matched nonsmokers [14 females, 14 males; age, 26.9 (2.4) years]. Subjects underwent imaging on two separate occasions 1 week apart: smoking satiety versus overnight smoking deprivation, in a randomized counterbalanced order. Our results show no difference in amygdala responses to faces between nonsmokers and satiated smokers. However, overnight deprivation from smoking was associated with a significantly lowered amygdala response to fear, an effect that was probabilistically mapped to the basolateral amygdala. We suggest that aberrant amygdala reactivity in overnight-deprived smokers may reflect a pre-existing vulnerability to smoking and/or increase the risk of smoking relapse after a cessation attempt.
authors: Department of Psychiatry, University of Bonn, 53105 Bonn, Germany.
authors: Oezguer A
authors: OA
authors: Onur
authors: Alexandra
authors: A
authors: Patin
authors: Yoan
authors: Y
authors: Mihov
authors: Boris
authors: B
authors: Buecher
authors: Birgit
authors: B
authors: Stoffel-Wagner
authors: Thomas E
authors: TE
authors: Schlaepfer
authors: Henrik
authors: H
authors: Walter
authors: Wolfgang
authors: W
authors: Maier
authors: René
authors: R
authors: Hurlemann
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