PROCESSES OF LOCAL AND DISTANT SYNCHRONIZATION OF ELECTRICAL BRAIN ACTIVITY DURING COLOR PERCEPTION
doi.org/10.17721/1728.2748.2025.100.26-34
Keywords:
electroencephalography (EEG), power spectral density (PSD) method, neurophysiology of color, color perceptionAbstract
Introduction. The human brain, with its complex structure and functional features, has always been a subject of intense scientific research. One of the key aspects of its activity is the ability to perceive, process, and interpret various external stimuli. Among these stimuli, colors hold a special place, as they not only influence our mood and state but also play a role in shaping our perception of the surrounding world and affecting cognitive processes.
Methods. This study involved 21 healthy volunteers (n♀=11), aged 18 to 27 years. Participants watched a video while EEG recording was conducted. For analysis, the θ, α, and β frequency bands were divided into the following sub-bands: θ1 (3.5–7.4 Hz), α1 (7.5–9.4 Hz), α2 (9.5–10.7 Hz), α3 (10.8–13.5 Hz), β1 (13.6–19.9 Hz), and β2 (20–30 Hz).
Results. The analysis revealed a significant difference in the power of the α3 sub-band when perceiving red, which may be characteristic of a negative emotional response caused by increased anxiety levels. At the same time, a significant difference was observed in the β1 band in response to blue and green colors, which may indicate increased attention and concentration when exposed to these visual stimuli.
Conclusions. The study showed that color perception affects the bioelectrical activity of the brain, in particular, red is associated with increased anxiety (alpha-3 range), and blue and green with increased concentration of attention (beta-1 range). The results confirm the effectiveness of spectral analysis in studying the neurophysiological mechanisms of color perception, and it can be used in neuropsychology and cognitive sciences.
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