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Figure 30 | Journal of Circadian Rhythms

Figure 30

From: Transdisciplinary unifying implications of circadian findings in the 1950s

Figure 30

Changing amplitude of some components in a partial spectral element of the postnatal human heart rate chronome. Data from a healthy boy, born 19.10.1992, whose heart rate was measured at mostly 30-minute intervals from 20.10 for the ensuing 40 days, and analyzed as a moving spectrum in separate weekly intervals, displaced in 12-hour increments through the data set. An initially greater prominence of infradians (see ~1 week c, left), shown by height and shading, corresponding to a larger amplitude, contrasts with the prominence of circadians and circasemidians in later weeks of life, while any ultradians with still higher frequencies and any trends and chaos, two other chronome elements, are here unassessed. Gliding spectral window of amplitudes of heart rate, focusing on infradians and circadians (side view) in the first 40 days of life of a boy born at term (FW). Prominence of infradian spectral components immediately after birth is apparent from shading, height and arrows [165, 166]. Original data of Yoshihiko Watanabe.

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