THE CHAOTIC BEHAVIOR OF RESTING HUMAN RESPIRATION

被引:60
作者
DONALDSON, GC [1 ]
机构
[1] UNIV LONDON LONDON HOSP,COLL MED,DEPT PHYSIOL,LONDON E1 1BB,ENGLAND
来源
RESPIRATION PHYSIOLOGY | 1992年 / 88卷 / 03期
关键词
CHAOS; PATTERN OF BREATHING; LYAPUNOV EXPONENT; MAMMALS; HUMAN; CHAOTIC BEHAVIOR;
D O I
10.1016/0034-5687(92)90005-H
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
The study of non-linear mathematics has led to the concept of an attractor that can confine to within certain boundaries the path traced out in multidimensional space when a variable is plotted against itself delayed by various lag times. The type of attractor present can be determined by monitoring the exponential rate (called a Lyapunov exponent) at which almost identical values within a time series become dissimilar. Lyapunov exponents estimated from data collected during the normal resting breathing of eight adults were all positive, end-tidal P(CO2) had the lowest Lyapunov exponent (0.06 +/- 0.01 bits/s; Mean +/- SE), breath and expiratory duration had the highest exponents (0.23 bits/s). The results indicate that resting respiration is chaotic. This chaotic behaviour may allow fast and flexible responses to sudden changes, allow if necessary complete readjustment of the control parameters, and may be involved in the phase locking of respiration to external stimuli.
引用
收藏
页码:313 / 321
页数:9
相关论文
共 14 条
[1]  
[Anonymous], 1958, MEASUREMENT POWER SP
[2]  
BAKER GL, 1990, CHAOTIC DYNAMICS INT
[3]  
BERTHOLON JE, 1987, CONCEPTS FORMATIZATI, P9
[4]   RELATION BETWEEN TIDAL VOLUME AND INSPIRATORY AND EXPIRATORY TIMES DURING STEADY-STATE CARBON-DIOXIDE INHALATION IN MAN [J].
GARDNER, WN .
JOURNAL OF PHYSIOLOGY-LONDON, 1977, 272 (03) :591-611
[5]   CHANGES IN TIDAL VOLUME, FREQUENCY, AND VENTILATION INDUCED BY THIR MEASUREMENT [J].
GILBERT, R ;
AUCHINCL.JH ;
BODEN, W ;
BRODSKY, J .
JOURNAL OF APPLIED PHYSIOLOGY, 1972, 33 (02) :252-&
[6]  
Haldane J.S., 1935, RESPIRATION
[7]   ANALYSIS OF PERIODIC CHANGES IN VENTILATION IN NEWBORN-INFANTS [J].
HATHORN, MKS .
JOURNAL OF PHYSIOLOGY-LONDON, 1978, 285 (DEC) :85-99
[8]   SIMPLE MATHEMATICAL-MODELS WITH VERY COMPLICATED DYNAMICS [J].
MAY, RM .
NATURE, 1976, 261 (5560) :459-467
[9]  
NEWSOMDAVIS J, 1975, J PHYSIOL-LONDON, V245, P481
[10]   THE ENTRAINMENT OF VENTILATION FREQUENCY TO EXERCISE RHYTHM [J].
PATERSON, DJ ;
WOOD, GA ;
MORTON, AR ;
HENSTRIDGE, JD .
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY, 1986, 55 (05) :530-537