Health

Retinal vascular 'fingerprint' can predict stroke risk

2025-01-17   

A good night's sleep clears one's mind. An international team recently published a paper in the American academic journal Cell, stating that a substance called norepinephrine plays a crucial role in the process of "washing away" waste in the brain of mice during deep sleep. Researchers from institutions such as the University of Copenhagen in Denmark and the University of Oxford in the UK have found that during deep sleep in mice, the brainstem releases a wave of norepinephrine approximately every 50 seconds, triggering vasoconstriction and causing the surrounding cerebrospinal fluid to flow rhythmically, carrying away waste. Mouse experiments also showed that sleep aids such as sleeping pills may disrupt this mechanism. They administered the commonly used sleeping pill zolpidem to mice and found that although the mice taking the sleeping pill fell asleep faster, compared to mice falling asleep naturally, the level of norepinephrine released through the above mechanism during deep sleep was 50% lower, and the amount of fluid transported into the brain was reduced by more than 30%. The research team stated that the physiological structure of the human brain is similar to that of mice, but further research is needed to confirm whether this mechanism also exists. (New Society)

Edit:Chen Jie Responsible editor:Li Ling

Source:Science and Technology Daily

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