Influence of tDCS on right hemisphere OFC on executive performance of high risk decision making and risk taking

Decision-making is part of the cognitive control that plays a key role in the evaluation of desires. The present study was performed to investigate the effects of tDCS on the left hemisphere DLPFC brain region in high-risk decision making and risk-taking.

The study was a single-blind experimental study performed on 30 healthy adults. In this study, subjects were randomly divided into two experimental and sham groups. In the experimental group, anodal stimulation over the right hemisphere OFC and cathodal stimulation over the left DLPFC was performed at 2 mA. The tasks used were computer versions of Balloon Analogue Risk Task(BART) and Iowa Gambling Task(IGT) for evaluating high-risk decision making and risk-taking. Data were analyzed using a one-way ANCOVA test.

Results showed a significant difference between the experimental and control groups in the Bart test.