Methodology: Partial moving spectra of postnatal heart rate chronome

We demonstrate the use of complementary displays in moving spectra of amplitude, relative prominence and statistical significance and the further complementary use of 3D views from the top and the side, thereby combining time-microscopy for precise scrutiny of quantification in time (in the view from the top) with some degree of eye-balling of essential features in the lateral view. We complement, with the foregoing refinements, the usual demonstration of amplitudes, the usual endpoint, by the percentage rhythm and derived by the same computation by an estimation of ordering probability. All these partly redundant related approaches suggest that the different components in the region of the spectral element of the time structure or chronome of a healthy newborn arise as components in their own right. We note methodologically that moving spectra add valuable information to chronobiologic serial sections. We specifically document that an initial infradian prominence characterizes the spectral element of the chronome of half-hourly heart rates during the first 40 days after birth of a boy born at term. Infradian prominence early after birth, previously documented for many premature infants and anticipated from the integration of 2-day segments of half-hourly data from clinically healthy infants born at term, displayed longitudinally by moving spectra, can be easily viewed as changes during the first month of life, that are characterized by the transition in the human circulation from infradian to circadian prominence.