title: Circadian rhythms of performance among workers in the Arctic.
abstract: Subjects lving in the high Arctic carried out performance tests at the ends of the dark and light seasons and the intervening transitional seasons. In all four seasons, subjects showed circadian rhythms of performance. Rhythms for speed and accuracy were opposite in phase. The results show that normal rhythms are maintained when subjects follow a customary 24-h work pattern even though solar light-dark cycles are absent.
mesh_terms: D001110:Arctic Regions; D002940:Circadian Rhythm; D003624:Darkness; D006801:Humans; D008027:Light; D009048:Motor Skills; D012621:Seasons; D013647:Task Performance and Analysis; D014937:Work