Pattern of shift rota modulates oral temperature circadian rhythm and sleep-wakefulness profiles in shift workers |
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Authors: | Shobha Gupta Atanu Kumar Pati Francis Levi |
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Institution: | 1. C’hronophysiologv Laboratory, School of Life Sciences, Pt. Ravishankar Shukla University, 492010, Raipur, India 2. ‘Laboratoire —Chronobiologie-Chronopharmacologie-Cancer’ SDI-CNRS 1-6212, H?pital Paul Brousse, 12 16. Avenue Paul-Vaillant-Couturier, 94804, Villejuif, France
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Abstract: | Twenty four shift workers (8 from a steel industry and 16 from a Government hospital) participated in the study. The subjects
were instructed to self-measure oral temperature, 4 6 times a day for about three weeks. Sleep quantity and quality for each
subject were analysed with the help of an appropriate inventory. The data were analysed by cosinor and power spectrum methods.
The frequency of circadian rhythm detection was in the order of 48% in senior nurses, 29% in steel plant workers and 14% in
junior nurses. These were also complemented by the results of power spectrum analysis. Present results suggest that rhythms
of subjective fatigue and subjective drowsiness are governed neither by oral temperature oscillator nor by the sleep/wake
cycle oscillator. The results show that shift rotation pattern chiefly modulates the circadian time structure of shift workers.
It is also suggested that the phenomenon of circadian rhythm desynchronization in oral temperature appears to be independent
of per day total sleep length. |
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Keywords: | Circadian rhythm oral temperature rhythm desynchronization shift workers sleep length sleep quality |
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