Abstract
Independent component analysis (ICA) of 19-channel background EEG was performed in 111 patients with the early signs of depressive disorders and in 526 healthy subjects. The power spectra of the independent components were compared in the depressive patients and in healthy subjects at the eyes closed and eyes opened states. Statistically significant differences between the groups were detected in three frequency bands: θ (4–7.5 Hz), α (7.5–14 Hz), and β (14–20 Hz). Increased θ and α activities in parietal and occipital derivations of depressive patients may have been caused by a reduced cortical activity in the projection of these derivation. Diffuse enhancement of the β activity may be correlated with anxiety symptoms that are pronounced in the clinical picture of depressive disorders at early stages of the disease. ICA used to compare quantitative EEG parameters in different groups of patients and in healthy persons makes it possible to localize the differences more accurately than the traditional analysis of EEG spectra.
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Original Russian Text © V.A. Grin-Yatsenko, I. Baas, V.A. Ponomarev, Ju.D. Kropotov, 2011, published in Fiziologiya Cheloveka, 2011, Vol. 37, No. 1, pp. 45–55.
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Grin-Yatsenko, V.A., Baas, I., Ponomarev, V.A. et al. Electroencephalograms of patients with initial signs of depression: Independent component analysis. Hum Physiol 37, 39–48 (2011). https://doi.org/10.1134/S0362119710051019
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DOI: https://doi.org/10.1134/S0362119710051019