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首页> 外文期刊>Neuroscience Journal >Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica
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Circadian Levels of Serum Melatonin and Cortisol in relation to Changes in Mood, Sleep, and Neurocognitive Performance, Spanning a Year of Residence in Antarctica

机译：在南极居住一年的时间里，血清褪黑激素和皮质醇的昼夜水平与情绪，睡眠和神经认知功能的变化有关

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Background. Altered circadian cortisol and melatonin rhythms in healthy subjects exposed to an extreme polar photoperiod results in changes in mood and sleep, which can influence cognitive performance.Materials and Methods. We assessed the circadian rhythm of 20 subjects who wintered over at Maitri (70°S,11°E), India’s permanent Antarctic station, from November 2010 to December 2011. Serum cortisol and melatonin levels were measured by radioimmunoassay at 8 am, 3 pm, 8 pm, and 2 am in a single day, once each during the polar summer and winter photoperiods. Conventional psychological tests, Depression, Anxiety, and Stress Scale (DASS-42), Epworth Sleepiness Scale (ESS), and a computerized neurocognitive test battery were used to measure mood, sleep, and cognitive performance.Results. The mean scores for DASS42 were higher during midwinter suggesting the presence of “overwintering.” Mean diurnal cortisol levels during summer and winter were comparable, but the levels of melatonin were markedly higher during winter. Higher 8 am melatonin levels were associated with better sleep quality, lower depression scores, and better performance in tasks like attention, visual memory, and arithmetic.Conclusion. Timing of artificial light exposure and usage of melatonin supplements in improving sleep and cognitive performance in expedition teams are of future research interest.
机译：背景。健康受试者暴露于极端极性光周期的昼夜节律性皮质醇和褪黑激素节律改变会导致情绪和睡眠改变，从而影响认知表现。材料和方法。我们评估了2010年11月至2011年12月在印度永久南极站Maitri（70°S，11°E）越冬的20位受试者的昼夜节律。通过放射免疫法在上午8点，下午3点通过放射免疫测定法测定了血清皮质醇和褪黑激素的水平。每天晚上8点和凌晨2点，在夏季和冬季的极光时期每个一次。常规的心理测验，抑郁，焦虑和压力量表（DASS-42），爱泼华嗜睡量表（ESS）和计算机化的神经认知测验被用来测量情绪，睡眠和认知表现。 DASS42的平均分数在仲冬期间较高，表明存在“越冬”。夏季和冬季的平均每日皮质醇水平相当，但冬季的褪黑激素水平明显更高。较高的8上午褪黑素水平与更好的睡眠质量，更低的抑郁评分以及在诸如注意力，视觉记忆和算术等任务中的更好表现有关。人造光曝光的时间以及褪黑素补充剂在改善探险队的睡眠和认知表现中的用途是未来研究的兴趣。

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