【太空飞行如何改变大脑:微重力会改变白质】

【太空飞行如何改变大脑:微重力会改变白质】研究人员研究了15名宇航员在太空飞行前后的脑部扫描,这些评估揭示了大脑与运动和感觉信息相关的区域中白质的变化。这些被描述为恶化,它们与人体衰老时自然发生的情况相似,尽管它们的发生速度非常快。但也许从这项研究中得出的最有趣的一点是太空飞行后在大脑底部聚集的“液体池”(脑脊髓液)的证据。下面聚集的“液体池”意味着宇航员在微重力任务后其基本上大脑整个向上位移。

How spaceflight changes the brain: Study on 15 astronauts reveals micro-gravity alters white matter and causes brain to float higher in the skull

A new study supported byhas shed worrying light on the effects of space travel on the human brain.

Brain scans of astronauts from before and after spaceflight revealed changes typically associated with long term processes such as aging, including deterioration in areas responsible for movement and the processing of sensory information.

The results, however, also suggest an astronaut’s brain may be able to adapt to these changes over time.

‘We know that fluid shifts toward the head in space,’ said Rachel Seidler, a professor with the College of Health and Human Performance at the University of Florida.

‘When you see photos and video of astronauts, their faces often look puffy, because gravity isn’t pulling fluids down into the body.’

These gravitational effects aren’t just worn on the surface – according to the new study, spaceflight directly affects the brain’s white matter in the regions that control movement and process sensory information.

And, the team found that spaceflight causes fluid around the brain to pool at the base of the cerebrum, as if the brain is ‘floating higher’ in the skull.

This could play a key role in a condition called Spaceflight Associated Neuro-Ocular Syndrome, which causes visual changes and flattening in the back of the eye.

‘It could be slower fluid turnover, it could be pressure on the optic nerve or that the brain is sort of tugging on the optic nerve because it’s floating higher in the skull,’ Seidler said.

But, the researchers say, the white matter problems don’t appear to be permanent.

原文:https://www.dailymail.co.uk/sciencetech/article-6633583/How-spaceflight-changes-brain-Study-15-astronauts-reveals-micro-gravity-alters-white-matter.html


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