Gleeson, James P. and Stefanovska, Aneta (2007) A simple model for 1/f spectra in heart rate variability. In: PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) :. PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE), 6602 (084101). SPIE-INT SOC OPTICAL ENGINEERING, Bellingham, Washington, USA. ISBN 978-0-8194-6739-3
Full text not available from this repository.Abstract
Heart rate variability (HRV) measures cycle-to-cycle correlations in the instantaneous oscillation period of the heart. In this paper it is shown that a simple model process, consisting of a sum of uncoupled sinusoidal oscillators with slightly different frequencies, has a HRV spectrum with a 1/f scaling over a range of frequencies. This implies that the appearance of 1/f HRV spectra in experiments should not be considered evidence of oscillator coupling or other more complex dynamics. The origin of the 1/f scaling in the model is examined analytically, and its dependence upon the sampling of low-amplitude fluctuations of the process is highlighted.