Breaking cognition!Healthy human brain deep temperature exceeds 40 ℃

New studies published in the "Brain" magazine on the 12th show that the temperature of normal human brain temperature is much larger than people thought before. Among healthy people with oral temperatures are usually lower than 37 ° C, the average brain temperature is 38.5 ° C, while the deep -stratum areas of the brain often exceed 40 ° C, especially women's brains in the daytime. Studies have shown that the daily cycle of brain temperature is closely related to survival. These findings can improve the understanding, prognosis and treatment of brain injury.

This new study was led by researchers at the Mimne Biology Laboratory of Cambridge Medicine Research (MRC). They produced the first 4D map of the temperature of healthy human brain. This picture has overthrew several previous assumptions, showing the changes in the brain temperature with the changes in the brain area, age, gender, and time of the day. It is important that these discoveries also challenged a generally recognized point: human brain and body temperature are the same.

In order to study a healthy brain, researchers recruited 40 volunteers aged 20-40 to scan their brain in the morning, afternoon and late night. They also provide participants with an activity monitor worn on the wrist, so that everyone's biological clock and lifestyle differences can be taken into account. Whether it is a "night owl" or "early -getting bird", as long as you know the biology time that measures the temperature of the brain, you can consider the difference between the biological clock of each volunteer in the analysis.

Among the healthy subjects, the average temperature of the brain was 38.5 ° C, which was more than 2 ° C higher than the temperature measured under the tongue. Studies have also found that the changes in brain temperature depend on the time, brain area, gender and menstrual cycle, and age.

Although the surface of the brain is usually cold, the temperature of the deep structure of the brain is often higher than 40 ° C; the maximum brain temperature observed is 40.9 ° C. Among all individuals, the temperature of the brain is unanimously displayed. The range of time changes at the time of the day is close to 1 ° C. The highest brain temperature is in the afternoon, the lowest is at night.

On average, women's brain temperature is about 0.4 ℃ higher than men. This gender difference is likely to be caused by the menstrual cycle, because most women receive scanning during the post -ovulation phase of their cycle, and their brain temperature is about 0.4 ° C higher than before ovulation.

The results also showed that within the 20 -year -old difference between the participants, the brain temperature rose with age, and the most obvious is the deep -stratum region of the brain, with an average increase of 0.6 ° C. Researchers have proposed that the cooling capacity of the brain may worsen with age, and it is necessary to further study whether this is related to the development of age -related brain diseases.

(Source: Science and Technology Daily Intern Reporter Zhang Jiaxin)

【Edit: Jinxin】

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