NIRSによる視覚刺激呈示時の快・不快情動の評価

抄録

Detection and isolation of human emotion from brain activities has been attracted in various research fields such as neuromarketing. A relation between a level of brain activity and pleasant and unpleasant emotions has been studied using Nearinfrared Spectroscopy (NIRS). This non-invasive technique uses near-infrared light to evaluate increases or decreases in oxygenated hemoglobin or deoxygenated hemoglobin in tissues below the body surface. However, it is difficult to find out the difference between the pleasant and unpleasant emotion on the brain activity because the different stimuli were used in the experiments in previous studies. In this study, the relation between the brain activity and the pleasant and unpleasant emotions was evaluated using International Affective Picture System (IAPS) and NIRS. Based on the NIRS recording for 21 participants, the effect of pleasant and unpleasant emotion on the brain activity is studied first. Then, detection of pleasant and unpleasant emotion from NIRS signal was conducted using Neural Network. Results showed that a significant difference in the brain activity can be appeared in the central part of the frontal lobe. It is also shown that the pleasant and unpleasant emotion can be detected with the accuracy of 96% (the highest) and 70% (average).