Investigating the deceptive task in dorsolateral prefrontal cortex by Functional Near-infrared Spectroscopy (fNIRS)

Truthful and deceptive responses are socially and legally important behavior. In a recent year, brain imaging measurement applied to find deception response. However, with these brain imaging techniques, the cognitive brain activities can be determined with stressful for participants. In this study, the pattern of brain activity is characterized with multi - channel near - infrared spectroscopy (NIRS) in the region of dorsolateral prefrontal cortex which is related to response of lying. The sample consisted of two undergraduate students. The subject had to perform specific truthful and deceptive responses tasks by choosing cards. We need to examine the location of detecting deceptive response which chosen randomly by the participant. The method of detection deception was calculated by the area under the curve in the change in concentration oxygenated hemoglobin (HbO(2)) during specific time of performance in task. In this study, the study found that the right group of channels was indicated deceptive task as maximum area value under the curve in the concentration change of HbO(2).