Adaptive AR modeling using Kalman filtering revealed that the transition from a normoxic to a hypoxic state in intact animals requires tremendous short-term readjustment of autonomic control.
Adaptive AR modeling using Kalman filtering is a useful tool for analyzing nonstationary physiological signals like heart rate and EEG.
An adaptive on-line procedure is presented for autoregressive (AR) modeling of nonstationary multivariate time series by means of Kalman filtering. The parameters of the estimated time-varying model can be used to calculate instantaneous measures of linear dependence. The usefulness of the procedures in the analysis of physiological signals is discussed in two examples: First, in the analysis of respiratory movement, heart rate fluctuation, and blood pressure, and second, in the analysis of multichannel electroencephalogram (EEG) signals. It was shown for the first time that in intact animals the transition from a normoxic to a hypoxic state requires tremendous short-term readjustment of the autonomic cardiac-respiratory control. An application with experimental EEG data supported observations that the development of coherences among cell assemblies of the brain is a basic element of associative learning or conditioning.
Arnold et al. (Fri,) conducted a other in Physiological signals (respiratory movement, heart rate, blood pressure, EEG). Adaptive AR modeling by means of Kalman filtering was evaluated. Adaptive AR modeling using Kalman filtering revealed that the transition from a normoxic to a hypoxic state in intact animals requires tremendous short-term readjustment of autonomic control.