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Consequences of one year of Antarctic isolation on sleep, chronotype and social jetlag

Camila Tortello

  • CABA,
  • Argentina
  • Camila Tortello ¹
  • , Agustín Folgueira ²
  • , Juan Manuel Cuiuli ²
  • , Juan Manuel Lopez ²
  • , Guido Simonelli ³
  • , Walter Mac Cormack ⁴
  • , Diego Andrés Golombek ¹
  • , Daniel Eduardo Vigo ¹
  • , Santiago Andrés Plano ¹
  • 1 (1) Chronobiology Lab, National University of Quilmes (UNQ), (2) Institute for Biomedical Research (BIOMED), Catholic University of Argentina (UCA) and National Scientific and Technical Research Council (CONICET), Argentina.
  • 2 (a) Argentine Joint Antarctic Command, (b) Neurology Department, Central Military Hospital, Argentine Army, Ciudad Autónoma de Buenos Aires, Argentina.
  • 3 University of Montreal, Quebec, Canada.
  • 4 Argentine Antarctic Institute, Argentina.

Circadian misalignment has shown deleterious consequences on human health. Light exposure and social cues are two of the most important zeitgebers that guarantee circadian rhythms synchronization. Antarctica offers the possibility to explore and describe circadian rhythms functions during isolation and extreme photoperiod conditions. This research aimed to analyze the impact of one year of Antarctica confinement on sleep duration, naps, chronotype, and social jetlag. During five winter campaigns at Belgrano II Argentinian Antarctic Station each crew was assessed with the Munich Chronotype Questionnaire (MCTQ) throughout a year (March – May – July – Sep – Nov) (N=84). Data showed changes during winter, with less sleep duration in workdays (Month p< 0.001, post hoc July