The diurnal pattern of some physiological and psychological functions in permanent night workers and in men working on a two-shift (day and night) system
Adjustment of circadian rhythms to phase shifts has been studied in two essentially different conditions. While trans-zonal air travels involve a sudden change in all Zeitgebers, adjustment to unusual work/rest schedules is normally counteracted by many important environmental time cues like the alternation between light and darkness, and the social surroundings including the family. Several studies have shown that in the more optimal conditions of air travel, phase adjustment usually requires a few days (1); for some physiological functions the time taken is even longer.
Unable to display preview. Download preview PDF.
- 2.Conroy, R.T.W.L. and Mills, J.N. Human circadian rhythms. Churchill, London 1970Google Scholar
- 3.Lobban, M.C. Human diurnal rhythms in an Arctic mining community. J. Physiol. 165, 75–76 (1963)Google Scholar
- 5.Teleky, L. Problems of nightwork: influences on health and efficiency. Ind. Med. Surg. 12, 758–779 (1943)Google Scholar
- 6.Hockey, G.R.J, and Colquhoun, W.P. Diurnal variation in human performance: a review. In: W.P. Colquhoun (Ed.): Aspects of human efficiency. The English universities Press, London 1972Google Scholar
- 7.Colquhoun, W.P. Circadian variations in human efficiency. In: W.P. Colquhoun (Ed.): Biological rhythms and human performance. Academic Press, London 1971Google Scholar
- 8.Smith, P.A. Oral temperature rhythms in two groups of industrial shift-workers . In: A. Swensson (Ed.): Proceedings of the Second International Symposium on Night and Shift Work. Studia Laboris et Salutis, Stockholm 1972Google Scholar
- 11.Fröberg, J., Karlsson, C.-G. and Levi, L. Shift work: a study of catecholamine excretion, self-ratings and attitudes. In: A. Swensson (Ed.): Proceedings of the Second International Symposium on Night and Shift Work. Studia Laboris et Salutis, Stockholm 1972Google Scholar
- 12.Mc Nemar, Q. Psychological statistics. Wiley, New York 1960Google Scholar
- 14.Bonjer, F.H. Physiological aspects of shift work. Proc. 13th Int. Congr. Occup. Health, pp. 848–849 (1960)Google Scholar
- 15.Fröberg, J., Karlsson, C.-G., Levi, L. and Lidberg, L. Circadian variations in performance, psychological ratings, catecholamine excretion, and urine flow during prolonged sleep deprivation. Rep. Lab. Clin. Stress Res. No. 14 (1974)Google Scholar
- 16.Pátkai, P. Relations between catecholamine release and psychological functions. Rep. Psychol. Lab. 1970, Suppl. 2Google Scholar