Author:
Reinberg A.,Touitou Y.,Restoin A.,Migraine C.,Levi F.,Montagner H.
Abstract
ABSTRACT
Circadian and ultradian rhythms in urinary excretion of 17-hydroxycorticosteroids were documented individually during an 8-day span in two pairs of young male twins. Studies were performed once at the age of 6 years for dizygotic twins and twice at the ages of 4·3 and 10·3 years for monozygotic twins. Four different methods were used for time-series analyses: chronograms (raw data), best-fitting curves resulting from cosinor analyses, power spectra and correlations of time-qualified data. Estimates of rhythm parameters (prominent periods, acrophases, etc.) as well as shapes of curves were closer in mono- than in dizygotic twins. Both similarities and small differences in rhythm characteristics of monozygotic twins were detected at both ages considered.
J. Endocr. (1985) 105, 247–253
Subject
Endocrinology,Endocrinology, Diabetes and Metabolism
Cited by
28 articles.
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