caa a22 4500 477083188 CHVBK 20180405111455.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF01920718 doi (NATIONALLICENCE)springer-10.1007/BF01920718 Seasonal pattern of melatonin excretion in humans: relationship to daylength variation rate and geomagnetic field fluctuations [Elektronische Daten] [J. Bergiannaki, T. Paparrigopoulos, C. Stefanis] In order to investigate the influence of various environmental parameters on melatonin excretion, the night-time urinary melatonin excretion of 16 healthy volunteers was measured in samples collected monthly over a period of one year. No significant interindividual differences were detected in the monthly rate of change of melatonin excretion. A seasonal bimodal pattern did, however, emerge. Peak values were observed in June and November. In these months a combination of high daylength stability and low values of the vertical component of the geomagnetic field was recorded. Trough values were found in April and August-October when low daylength stability was combined with high values of the vertical component of the geomagnetic field. We propose that the daylength variation rate, and the fluctuations of the vertical component of the geomagnetic field, interact to induce the changes in melatonin secretion which signalize the different seasons in humans. Birkhäuser Verlag, 1996 Melatonin nationallicence excretion nationallicence seasonal pattern nationallicence daylength variation rate nationallicence geomagnetic field nationallicence Bergiannaki J. University Mental Health Institute, Athens University Medical School, Eginition Hospital, 72-74 Vas. Sophias Ave., 115 28, Athens, Greece aut Paparrigopoulos T. University Mental Health Institute, Athens University Medical School, Eginition Hospital, 72-74 Vas. Sophias Ave., 115 28, Athens, Greece aut Stefanis C. University Mental Health Institute, Athens University Medical School, Eginition Hospital, 72-74 Vas. Sophias Ave., 115 28, Athens, Greece aut Experientia Birkhäuser-Verlag 52/3(1996-03-01), 253-258 0014-4754 52:3<253 1996 52 18 https://doi.org/10.1007/BF01920718 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01920718 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bergiannaki J. University Mental Health Institute, Athens University Medical School, Eginition Hospital, 72-74 Vas. Sophias Ave., 115 28, Athens, Greece aut NATIONALLICENCE 700 1- Paparrigopoulos T. University Mental Health Institute, Athens University Medical School, Eginition Hospital, 72-74 Vas. Sophias Ave., 115 28, Athens, Greece aut NATIONALLICENCE 700 1- Stefanis C. University Mental Health Institute, Athens University Medical School, Eginition Hospital, 72-74 Vas. Sophias Ave., 115 28, Athens, Greece aut NATIONALLICENCE 773 0- Experientia Birkhäuser-Verlag 52/3(1996-03-01), 253-258 0014-4754 52:3<253 1996 52 18 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer