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Details van artikel 2 van 9 gevonden artikelen
| Titel: |
A geophysical note on man's free-running circadian rhythm |
| Auteur: |
Heynick, Frank |
| Verschenen in: |
Biological rhythm research |
| Paginering: | Jaargang 17 (1986) nr. 2 pagina's 113-119 |
| Jaar: |
1986-07 |
| Inhoud: |
In consideration of the possibility that the close correspondence between the lunar day and the reported average length of man's free-running circadian rhythm is not, from an evolutionary point of view, entirely coincidental (even though the moon does not appear to function as Zeitgeber to subjects in temporal isolation), the present article calculates the length of the lunar and solar days back to some 1.3ยท109 years ago. While it is shown that on the average the lunar day in absolute, atomic clock hours decreases roughly 40 min for every 108 years we trace it back, it is also shown that the lunar day has in every epoch been approx. 31/2% longer than the solar day: roughly the same value by which the average length of man's free-running circadian rhythms presently exceeds the solar day. Possible evolutionary effects of tidal forces to account for the 3 1/4% correspondence are briefly considered. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 9 gevonden artikelen
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