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Gregory S. Berns,*Jonathan Chappelow,Milos Cekic,Caroline F. Zink,Giuseppe Pagnoni,Megan E. Martin-Skurski
Given the choice of waiting for an adverse outcome or gettingit over with quickly, many people choose the latter. Theoreticalmodels of decision-making have assumed that this occurs becausethere is a cost to waitingi.e., dread. Using functionalmagnetic resonance imaging, we measured the neural responsesto waiting for a cutaneous electric shock. Some individualsdreaded the outcome so much that, when given a choice, theypreferred to receive more voltage rather than wait. Even whenno decision was required, these extreme dreaders were distinguishablefrom those who dreaded mildly by the rate of increase of neuralactivity in the posterior elements of the cortical pain matrix.This suggests that dread derives, in part, from the attentiondevoted to the expected physical response and not simply fromfear or anxiety. Although these differences were observed duringa passive waiting procedure, they correlated with individualbehavior in a subsequent choice paradigm, providing evidencefor a neurobiological link between the experienced disutilityof dread and subsequent decisions about unpleasant outcomes.
Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, 101 Woodruff Circle, Suite 4000, Atlanta, GA 30322, USA.
* To whom correspondence should be addressed. E-mail: gberns{at}emory.edu
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