EEG Markers for Cognitive Decline in Elderly Using the Reconstructed Phase Space
| Autor: | Shih-Fang Huang, 黃士芳 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 This study develops new markers of dementia for the elderly based on the all-night EEG of a single channel. First of all, the sleep EEG from electrodes C3-A2, C4-A1, O1-A2 and O2-A1 have been recorded for 7 dementia''s patients and 19 age-matched normal controls. Second, the sleep EEG is transformed into 5 power time series corresponding to the delta, theta, alpha, sigma and beta frequency bands by power spectral density. Using the Reconstructed Phase Space, then use Average Mutual Information to determine the best delay time of phase space reconstruction and then followed by using false nearest neighbor to determine the best invading dimension of phase space reconstruction ; resulting in the five band power time series derived from 26 aged patients which it represents the level of chaos. Lyapunov exponents has been used in this study to identify dementia patients’ EEG characteristics. Results shown that there is a significant difference in P value (p |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|