NDLI: Possibility of mental health self-checks using divergence of pulse waves

Content Provider	IEEE Xplore Digital Library
Author	Mayumi Oyama-Higa, Teiijun Miao, Junko Tsujino, Akira Imanishi,
Copyright Year	2007
Description	Author affiliation: Chaos Technical Research Laboratory and CCI Incorporation 3-1-2401, Ryodocho, Nishinomiya-City, 662-0841, Japan (Teiijun Miao,) \|\| Graduate School of Humanities, Kwansei Gakuin University, Japan (Akira Imanishi,) \|\| Department of Integrated Psychological Science, Kwansei Gakuin University 1-1-155, Ichibancho,Uegahara, Nishinomiya-City, 662-8501, Japan (Mayumi Oyama-Higa,; Junko Tsujino,)
Abstract	We conducted a nonlinear analysis of fingertip pulse waves and found that the Lyapunov exponent referencing the “divergence” of chaotic attractor trajectory of fingertip pulse waves is an effective method for determining mental health in humans. In particular, we showed that this method is very effective for the early detection of dementia and depression, as well as in the detection of mental changes in healthy persons. In contrast, current measurement methods to determine mental health are subjective in most cases and are neither objective nor simple enough with respect to time and cost. The development of an apparatus allowing easy measurement for many users is therefore necessary. We illustrate the possibility of mental health self-checks using pulse wave divergence based on a series of examples in previous studies. In addition, we developed software to express the fluctuation of the Lyapunov exponent using time series data from multiple measurements. If changes in mental status can be assessed by studying the fluctuation factor of the Lyapunov exponent, we will be closer to effectively evaluating and controlling mental health problems.
Starting Page	3952
Ending Page	3960
File Size	523314
Page Count	9
File Format	PDF
ISBN	9781424409907
DOI	10.1109/ICSMC.2007.4414243
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-07
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dementia Pulse measurements Time measurement Chaos Humans Costs Fluctuations Diseases Current measurement Software measurement
Content Type	Text
Resource Type	Article

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