Effect of zeitgeber intensity reduction on a simulated dual-oscillator human circadian system: Classical and dynamic analysis

The two-oscillator model of human circadian rhythmicity was analyzed when a zeitgeber relative intensity of 1, 0.5, or 0.1 was introduced into the equations. Fourier analysis was compared with dynamic analysis such as attractor reconstruction or Liapunov exponent calculation. After a 50 or 90% reduc...

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Detalles Bibliográficos
Autores principales: Ortega, G., Golombek, D.A., Otero, D., Romanelli, L., Cardinali, D.P.
Formato: JOUR
Materias:
Circadian rhythm simulation
Dynamic systems
Models
Oscillator theory
Zeitgeber intensity
article
biological model
biometry
body temperature
circadian rhythm
Fourier analysis
human
physiology
sleep
wakefulness
Biometry
Body Temperature
Circadian Rhythm
Fourier Analysis
Human
Models, Biological
Sleep
Wakefulness
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07420528_v9_n2_p137_Ortega
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The two-oscillator model of human circadian rhythmicity was analyzed when a zeitgeber relative intensity of 1, 0.5, or 0.1 was introduced into the equations. Fourier analysis was compared with dynamic analysis such as attractor reconstruction or Liapunov exponent calculation. After a 50 or 90% reduction in zeitgeber intensity, the dynamics of the system became equivalent and differed significantly from those of a system with maximal zeitgeber intensity. When 10% aleatory noise was added to the data, the analysis was still applicable, and the results obtained were essentially the same as in the absence of noise. Dynamic analysis could thus provide a distinct classification for periodic data, based on the type of analysis. © 1992 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.

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