Title :
Analysis of dementia in aged subjects through chaos analysis of fingertip pulse waves
Author :
Oyama-Higa, Mayumi ; Miao, Teijun ; Mizuno-Matsumoto, Yuko
Author_Institution :
Kwansei Gakuin Univ., Nishinomiya
Abstract :
The fingertip pulse waves (plethysmograms) of 179 elderly people were measured and chaos analysis were performed on these waves to calculate the largest Lyapunov exponent, we acquired dementia data and ADL index recorded by healthcare professionals for the same subjects. We discovered a significant relationship between the value of the largest Lyapunov exponent and the degree of dementia and also communication skill. The relationship is displayed as a constellation graph of the time series.
Keywords :
Lyapunov methods; chaos; graph theory; health care; time series; ADL index; Lyapunov exponent; aged subjects; chaos analysis; constellation graph; dementia analysis; fingertip pulse waves; healthcare professionals; plethysmograms; time series; Aging; Biomedical measurements; Chaos; Chaotic communication; Dementia; Entropy; Performance analysis; Pulse measurements; Time measurement; Time series analysis;
Conference_Titel :
Systems, Man and Cybernetics, 2006. SMC '06. IEEE International Conference on
Conference_Location :
Taipei
Print_ISBN :
1-4244-0099-6
Electronic_ISBN :
1-4244-0100-3
DOI :
10.1109/ICSMC.2006.385308
