Quantifying and Analyzing Brainwave Electroencephalography with Welch’s Method

• DOI: 10.18494/sam4065
• Publication Date: 2023-05-12T22:13:27Z
• Authors: Che-An Chiu; Ming-Chi Lu; Yan-Lin Zhong; Tang-Yi Tsai; Chia-Ju Liu; Ming-Chung Ho

Brainwave signals are analyzed in the nonlinear analysis field and often studied by electroencephalography (EEG) using brain sensors.Although various frequency bands of brainwaves, such as α, β, θ can be filtered out from multi-frequency brainwave signals, most modern medicine only interprets meaning superficially rarely conducts an in-depth quantitative data.In this study, we selected healthy adults to experimentally analyze their sleep three stages: before sleep, during awakening after observed energy changes brainwaves these different periods.We used Welch's method quantify EEG data for analysis.It is generally believed that lower when asleep than awake.However, our experimental results show not all higher awake asleep, is, certain at frontal cortex location Fz, parietal Pz, central cortical Cz awake.In future, may extended applying sensors people with insomnia, Alzheimer's disease, amnesia, anxiety, emotional disorders, so forth.