9 Aug 2025

Stress and sleep

From Saturday Morning, 7:41 am on 9 August 2025

Sleep should be restful but sometimes it isn't.

New research from the University of Otago has found that when we're asleep, stress-controlling brain cells switch on and off in a steady rhythm about once every hour.

Karl Iremonger is Associate Professor at the University of Otago's department of Physiology and Director of the 
Centre for Neuroendocrinology. He talks to Mihi about this world-first research that could reveal how these patterns affect health, mood, and sleep.

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x Photo: Andrej Lišakov