Physics – Biological Physics
Scientific paper
2009-08-25
Physics
Biological Physics
Scientific paper
We use detrended fluctuation analysis (DFA) to study the dynamics of blood pressure oscillations and its feedback control in rats by analyzing systolic pressure time series before and after a surgical procedure that interrupts its control loop. We found, for each situation, a crossover between two scaling regions characterized by exponents that reflect the nature of the feedback control and its range of operation. In addition, we found evidences of adaptation in the dynamics of blood pressure regulation a few days after surgical disruption of its main feedback circuit. Based on the paradigm of antagonistic, bipartite (vagal and sympathetic) action of the central nerve system, we propose a simple model for pressure homeostasis as the balance between two nonlinear opposing forces, successfully reproducing the crossover observed in the DFA of actual pressure signals.
de Menezes Marcio Argollo
Galhardo C. E. C.
Penna Thadeu J. P.
Soares P. P. S.
No associations
LandOfFree
Detrended Fluctuation Analysis of Systolic Blood Pressure Control Loop does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Detrended Fluctuation Analysis of Systolic Blood Pressure Control Loop, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detrended Fluctuation Analysis of Systolic Blood Pressure Control Loop will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-233324