The week, inherited in neonatal human twins, found also in geomagnetic pulsations in isolated Antarctica

Germaine G Cornelissen-Guillaume, M. Engebretson, Dana E Johnson, K. Otsuka, N. Burioka, J. Posch, F. Halberg

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


About 7-day (circaseptan) components, found at different levels of organization, notably in relation to growth, regeneration, repair and development, are often viewed as reflecting no more than the 7-day societal schedule, ample evidence for a built-in feature notwithstanding. Herein, we resolve circaseptans in geomagnetic pulsations recorded by a stand-alone magnetometer residing in Antarctica, far away from societal influences. Human physiological data, collected in the neonatal intensive care unit, show by intra-class correlation analysis that the nonlinearly assessed circaseptan period of heart rate, diastolic blood pressure and body weight is more similar between same-gender twins than among twin pairs, lending additional support for the endogenicity of circaseptans. Like circadians, about-weekly features in environmental variables such as geomagnetic pulsations were genetically acquired in the course of evolution.

Original languageEnglish (US)
Pages (from-to)32-50
Number of pages19
JournalBiomedicine and Pharmacotherapy
Issue numberSUPPL.1
StatePublished - 2000

Bibliographical note

Funding Information:
U.S. Public Health Service (GM-l 398 1); National Heart, Lung, and Blood Institute, National Institutes of Health (HL-40650), University of Minnesota Supercomputing Institute and Dr. h.c. Dr. h.c. Earl Bakken Fund (FH, GC). Work at Augsburg College was supported by National Science Foundation grant OPP-9725076.

Copyright 2021 Elsevier B.V., All rights reserved.


  • Antarctica
  • Approximate entropy
  • Blood pressure
  • Chaos
  • Circaseptan
  • Endogenicity
  • Geomagnetic pulsations
  • Heart rate
  • Neonatal twins


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