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  • Winter-over syndrome

    Psychological condition related to the Antarctic or Arctic winter

    Medical condition

    Winter-over syndrome
    Midday during a polar winter in Finnmark, Norway.

    Note that the sun has not fully risen.

    SymptomsDepression, insomnia, hostility, anger/irritability, diminished cognitive performance, mild hypnotic states, irritable bowel syndrome
    Duration7-8 months (Polar winter)
    CausesPsychological stresses and isolation at research stations in Antarctica and the Arctic in winter
    TreatmentEnd of winter and/or departure from polar regions

    The winter-over syndrome is a condition that occurs in individuals who "winter-over" throughout the Antarctic (or Arctic) winter, which can last seven to eight months.[1] It has been observed in inhabitants of research stations in Antarctica, as well as in polar bases such as Thule, Alert and Eureka.

    It consists of a variety of behavioral and medical disturbances, including irritability, depression, insomnia, absentmindedness, aggressive behavior, and irritable bowel syndrome.[2]

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