title: The week, inherited in neonatal human twins, found also in geomagnetic pulsations in isolated Antarctica.
abstract: 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.
authors.affiliation: University of Minnesota, Minneapolis, USA.
authors.forename: G
authors.initials: G
authors.lastname: Cornélissen
authors.forename: M
authors.initials: M
authors.lastname: Engebretson
authors.forename: D
authors.initials: D
authors.lastname: Johnson
authors.forename: K
authors.initials: K
authors.lastname: Otsuka
authors.forename: N
authors.initials: N
authors.lastname: Burioka
authors.forename: J
authors.initials: J
authors.lastname: Posch
authors.forename: F
authors.initials: F
authors.lastname: Halberg
mesh_terms: D000204:Activity Cycles; D000465:Algorithms; D000864:Antarctic Regions; D001794:Blood Pressure / Q000502:physiology; D001835:Body Weight / Q000502:physiology; D002940:Circadian Rhythm; D018534:Earth, Planet; D004574:Electromagnetic Fields; D006801:Humans; D007231:Infant, Newborn; D007363:Intensive Care Units, Neonatal; D008991:Monitoring, Physiologic; D010507:Periodicity; D014427:Twins