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Related Experiment Videos

Nocturnal temperature in affective disorder.

D H Avery, G Wildschiødtz, O J Rafaelsen

    Journal of Affective Disorders
    |March 1, 1982
    PubMed
    Summary

    Patients with primary affective disorder exhibit altered body temperature rhythms during depression, including higher nocturnal temperatures and reduced 24-hour amplitude. These temperature patterns normalize after recovery, suggesting a link between circadian rhythms and mood regulation.

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    Area of Science:

    • Chronobiology
    • Psychiatry
    • Neuroscience

    Background:

    • Circadian rhythms, including temperature rhythms, are crucial for physiological and psychological well-being.
    • Disruptions in circadian function have been implicated in the pathophysiology of primary affective disorders, such as depression.

    Purpose of the Study:

    • To investigate the characteristics of body temperature rhythms in patients with primary affective disorder during depressive episodes and after recovery.
    • To compare these rhythms with those of healthy individuals.

    Main Methods:

    • Measurement of body temperature rhythms in 9 drug-free patients with primary affective disorder during depression and after recovery.
    • Comparison with temperature rhythms of 12 age- and sex-matched normal controls.
    • Analysis of nocturnal temperature, 24-hour amplitude, and timing of the temperature minimum.

    Main Results:

    • Patients exhibited higher nocturnal temperatures and decreased 24-hour temperature amplitudes when depressed compared to their recovered state and to controls.
    • No consistent shift in the timing of the temperature minimum was observed during depression compared to controls.
    • In a subset of patients (4 of 7), the temperature minimum occurred earlier during depression than during recovery.

    Conclusions:

    • Body temperature rhythms are significantly altered during depression in patients with primary affective disorder.
    • These alterations, characterized by elevated nocturnal temperatures and reduced amplitude, may reflect broader circadian dysregulation associated with the disorder.
    • The findings suggest that temperature rhythm disturbances could serve as a potential biomarker for depression and may normalize with mood improvement.

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