Sensitively recorded breathing signals of rats and their nonlinear dynamics

• Published in: Journal of biochemical and biophysical methods Vol. 70; no. 4; pp. 573 - 577
• Main Authors: Zeren, Tamer, Özbek, Mustafa, Ekerbiçer, Nuran, Yalçın, G. Çiğdem, Akdeniz, K. Gediz
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 10-06-2007
• Subjects: Animals; Calibration; Cardiorespiratory system; Embedding dimension; Heart - physiology; Inhalation - physiology; Logical Observation Identifiers Names and Codes; Nonlinear analysis; Pneumocardiogram; Rats; Respiration; Respiratory Mechanics - physiology; Sensitivity and Specificity; Trachea - physiology; Embedding dimension; Pneumocardiogram; Cardiorespiratory system; Nonlinear analysis
• ISSN: 0165-022X; 1872-857X
• DOI: 10.1016/j.jbbm.2007.01.007

Nonlinear dynamical properties of sensitively recorded breathing signals (SRBS), which include cardiac induced air flow pulsations so-called pneumocardiogram (PNCG) signals, are investigated, in this methodological study. For this purpose, we assessed the SRBS of laboratory rat. The nonlinear behaviors of SRBS were investigated by the reconstructing phase space, using the autocorrelation function and the false nearest neighbor method. The chaotic SRBS attractors were discussed from the point of view of the cardiopulmonary system. This method can be used to assess the heart performance and respiratory mechanics, and might be useful to design for the physiological studies of cardiorespiratory system in small laboratory animals.