An fMRI Study of Risky Decision Making: the Role of Mental Preparation and Conflict

introduction: the current study aimed to elucidate the role of preparatory cognitive control indecision making and its neural correlates using functional magnetic resonance imaging (fmri).to this effect, by employing a series of new cognitive tasks, we assessed the role of preparatorycognitive control in monetary (risky) decision making. methods: the participants had to decide between a risky and a safe gamble based on theirchance of winning (high or low). in the 2-phase gambling task (similar to cambridge gamblingtask), the chance and the gamble were presented at the same time (i.e. in a single phase), but ina new 3-phase gambling task, the chance is presented before the gamble. the tasks ended witha feedback phase. results: in the 3-phase task, holding the chance in memory to guide their decision enabledthe participants to have more control on their risk taking behaviors as shown by activation in anetwork of brain areas involved in the control and conflict, including dorsal anterior cingulatecortex (dacc), indexed by faster reaction times and better performance in the gambling task,and the temporal lobe, which has a role in holding contextual information. discussion: holding information in memory to guide decision presumably enables theparticipants to have more control on their risk taking behaviors. the conflict and uncertaintyresulting from this risky decision was indexed by the activation of dacc, known to be activatedin conflict and cognitive control.