Electroencephalographic Study of Human Brain: Chromatic Light Impact on Biological Rhythms

Abstract

Growing evidence suggests that blue light has a specific effect on human brain activity. Lighting companies are already actively promoting human-centric lighting. Here, the impact of chromatic light on the human brain was studied. The effects of blue, green, and red light on brain activity were compared using electroencephalography. Differences in brain activity in the occipital and central zones were analyzed. Two gender groups participated in the experiment. The frequency distribution of electroencephalographic signals for the central zone is significantly different in two gender groups. Photostimulation by chromatic light-emitting diodes initiates relatively the same signals in the occipital area. The frequency distribution of electroencephalographic signals in the central zone had a greater excitation of brain activity in blue photostimulation compared to green and red ones. This feature is noted in two gender groups. Blue light has an exciting effect on brain areas responsible for human biorhythms.