Figure 12
From: Methods for serial analysis of long time series in the study of biological rhythms
Wavelet analysis: procedure. The original series A, from a real motor activity record D is convolved with a sinusoidal-Gaussian-modulated function B obtaining the curve C after numerical smoothing. For each resulting cycle in C, three characteristic points are defined: when crossing zero upwards (the onset), the maximum (the middle) and when crossing zero downwards (the offset). In E, the evolution of these points cycle by cycle.