The Effects of Combined Stimulation Using Relaxation Scent and High Concentration Oxygen: fNIRS Study = The Effects of Combined Stimulation Using Relaxation Scent and High Concentration Oxygen: fNIRS Study

다국어 초록 (Multilingual Abstract)

The purpose of this study is to explore the effects of combined stimulation consisting of relaxation-inducing scent and high concentration oxygen on psychological/physiological responses. The cerebral blood flow responses and arousal that appear when the oxygen concentration was controlled under the same scent conditions were observed. The scent used in the experiment was lavender oil(relaxing scent), and as for the oxygen concentration, normal concentration oxygen(21%) and high concentration oxygen(30%) were used. The experiment was conducted by repeating a rest period(5 minutes) and a stimulation period(5 minutes) for a total of 12 adult males. In order to observe cerebral blood flow responses, hemoglobin(HbO) concentration was extracted according to the Beer-Lambert law. Arousal was evaluated using a 5-point scale questionnaire. A paired t-test was conducted for comparison between the two stimuli(Lavender_21%, Lavender_30%). As a result, HbO concentration in the frontal lobe increased and arousal decreased at Lavender_30% compared to Lavender_21%. These results suggest that the combined stimulation in which high concentration oxygen is additionally presented to the existing scent stimulation can induce more brain activation and relaxation.