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  • Title: Rhythmicity matters: Circadian and ultradian patterns of HPA axis activity.
    Author: Focke CMB, Iremonger KJ.
    Journal: Mol Cell Endocrinol; 2020 Feb 05; 501():110652. PubMed ID: 31738971.
    Abstract:
    Oscillations are a fundamental feature of neural and endocrine systems. The hypothalamic-pituitary-adrenal (HPA) axis dynamically controls corticosteroid secretion in basal conditions and in response to stress. Across the 24-h day, HPA axis activity oscillates with both an ultradian and circadian rhythm. These rhythms have been shown to be important for regulating metabolism, inflammation, mood, cognition and stress responsiveness. Here we will discuss the neural and endocrine mechanisms driving these rhythms, the physiological importance of these rhythms and health consequences when they are disrupted.
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