Physiological and Psychological Changes during Breathing Control Using Illuminance Changes with Different Cycles

In this study, the differences in the physiological effects of respiratory control using photic stimuli based on biological signals were examined. Comparing the alpha attenuation coefficient (AAC) before and after the task, it increased with the short-period illuminance pattern and decreased with the middle and long-period illuminance patterns. From the results of Lorenz plot (LP) areas, the arousal level increased and parasympathetic nervous system activity decreased with the short-period illuminance pattern. On the other hand, the arousal level decreased and parasympathetic nervous system activity increased with the middle and long-period illuminance patterns. These results suggest that the short-period illuminance pattern induced an active state, and the middle and long-period illuminance patterns induced a relaxed state.