Analysis of Electrogastrograms of Elderly Gastrectomized Subjects by Using Maximum Lyapunov Exponent  

作　　者：Hiroki Takada Yasuyuki Matsuura Masaru Miyao 

机构地区：[1]Graduate School of Engineering, University of Fukui, Fukui City 910-8507, Japan [2]Headquarters for Innovative Society-Academia Cooperation, University of Fukui, Fukui City 910-8507, Japan [3]Graduate School of lnformation Science, Nagoya University, Nagoya City 464-8601, Japan

出　　处：《Computer Technology and Application》2011年第12期985-990,共6页计算机技术与应用（英文版）

摘　　要：Not much data are available regarding the electrical activity in the stomachs and intestines of elderly gastrectomized patients The purpose of this study was to determine the feasibility of using a complex dynamic method to analyze the electrogastrograms （EGGs） of healthy young, healthy elderly, and gastrectomized elderly male individuals. The authors analyzed the EGGs by using the maximum Lyapunov exponent （MLE）, which is one of the indices of the chaotic characteristics of time series. Significant differences were observed between the MLEs estimated from the, EGGs of the young and elderly individuals for most of the temporal intervals. The authors＇ data indicate that the EGGs of elderly gastrectomized subjects might be distinguished from the EGGs of healthy elderly individuals on the basis of the MLE distribution.

关 键 词：Electrogastrogram （EGG） gastrectomized ATTRACTOR maximum Lyapunov exponent （MLE）. 

分 类 号：O415.5[理学—理论物理] S826.1[理学—物理]