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Analysis of age effects on Power Spectral Density (PSD) of alpha and theta rhythms during baseline recordings; (A) alpha PSD is generally higher on young subjects than on middle-age and elders; (B) alpha PSD is inversely correlated with age in all four electrode pools; (C) theta PSD is higher on young rather than on elder subjects in all electrode pools, and higher than on middle-aged subjects on FL pool; (D) theta PSD is inversely correlated with age in all four electrode pools.
