Neurology Department, Central Military Hospital, Argentine Army, Buenos Aires, Argentina.
Chronophysiology Lab, Institute for Biomedical Research (BIOMED), Catholic University of Argentina (UCA) and National Scientific and Technical Research Council (CONICET), Buenos Aires, Argentina.
Sci Rep. 2019 Jul 26;9(1):10875. doi: 10.1038/s41598-019-46900-7.
During Antarctic isolation personnel are exposed to extreme photoperiods. A frequent observation is a sleep onset phase delay during winter. It is not known if, as a result, daytime sleeping in the form of naps increases. We sought to assess sleep patterns - with focus on daytime sleeping - and alertness in a Latin American crew overwintering in Argentine Antarctic station Belgrano II. Measurements were collected in 13 males during March, May, July, September and November, and included actigraphy and psychomotor vigilance tasks. Sleep duration significantly decreased during winter. A total of eight participants took at least one weekly nap across all measurement points. During winter, the nap onset was delayed, its duration increased and its efficiency improved. We observed a significant effect of seasonality in the association of evening alertness with sleep onset. Our results replicate previous findings regarding sleep during overwintering in Antarctica, adding the description of the role of napping and the report of a possible modulatory effect of seasonality in the relation between sleep and alertness. Napping should be considered as an important factor in the scheduling of activities of multicultural crews that participate in Antarctica.
在南极隔离期间，人员会暴露在极端的光周期下。一个常见的观察结果是，冬季的睡眠起始阶段会延迟。目前尚不清楚，是否因此，白天以小睡形式的睡眠时间会增加。我们试图评估在阿根廷贝尔格拉诺 II 南极站越冬的拉丁美洲船员的睡眠模式——重点是白天的睡眠——和警觉性。在 3 月、5 月、7 月、9 月和 11 月期间，对 13 名男性进行了测量，包括活动记录仪和精神运动警戒任务。冬季睡眠时间明显减少。共有 8 名参与者在所有测量点都至少每周小睡一次。在冬季，小睡的起始时间延迟，持续时间增加，效率提高。我们观察到季节性对夜间警觉性与睡眠起始之间关联的显著影响。我们的研究结果复制了之前关于南极洲越冬期间睡眠的发现，增加了关于小睡作用的描述，并报告了季节性对睡眠和警觉性之间关系的可能调节作用。小睡应被视为参与南极洲活动的多元文化船员安排活动的重要因素。
