The brains of astronomers are transformed into space

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[EN VIDÉO] Don’t miss astronomy and space events in 2022
The year 2022 will be marked almost every month by big space and astronomical events, most importantly a small summary is always welcome!

A Space travel, It’s not unusual. Researchers have been observing this for a long time. During prolonged stay, the body Astronaut Are under severe stress. Because humanity has evolved over millions of years Gravity Those who rule the world. And once that space and this gravity are gone, our physiology is reversed.

The The brain Astronauts are no exception to these effects. This is confirmed by today Researchers at the University of Oregon (USA) at the end of studies MRI It was run by 15 astronauts who lived on the ship for several months International Space Station (ISS). The astronauts lent themselves to the test just before they set out into space. And right after. But after one, three and six months they come back. All of these images were then compared to the brains of all the controlling subjects in the world who remained around the world Duration Of study

The first thing researchers wanted to study, in particular, was the effect of such presence in the perivascular space. The human brain. They found that gaps between newborn astronauts – whose first flight into space – widened. On the other hand, among the more experienced astronauts, nothing like that happens. “Like they’ve reached a kind of homeostasis.”Comment by Juan Piantino, professor at the University of Oregon School of Medicine, in a Communication.

Reactions in space and on Earth

Remember that perivascular spaces coincide with the spaces that surround the veins and arteries of our brain. Who allow circulation Liquid Cerebrospinal These are part of a kind of cleansing system. Researchers call it Glimphatic system. It is responsible for eradication Protein Metabolic When we sleep. Otherwise, they will accumulate in our brains.

On Earth, scientists have observed that these perivascular spaces expand with age. But when they create a form of dementia. However, in space, despite real differences in MRI, researchers believe that these changes do not appear to lead to symptoms such as balance disorders or memory loss.

This work must be done to ensure the safety of the astronauts who will be leaving for the mission The moon. Or even, for Mission to Mars. But researchers have noted that they may help to better understand the disorders that are appearing on Earth. LawHydrocephalus, For example, which involves the circulation of cerebrospinal fluid. Hopefully, in the future, they will be better diagnosed and, of course, better treated.

Lack of gravitational force changes the brain

What is the effect of this?Weight loss In the brain? A recent survey looked at the question and revealed several changes in the brains of twelve astronauts who International Space Station.

Its essay Julie Corn Published on 03/14/2022

The human body was created on earth, where gravity nailed us to the ground. An extended stay in space, a foreign environment for our Earth, Force him to adapt. Scientists are carefully studying this phenomenon and its consequences.

To limit damage Mass Bones and muscles, practiced by astronauts on the International Space Station (ISS) Physical Between two scientific experiments. Weight loss will be followed by fatigue and constant tiredness The brain. For the first time, follow-up of twelve astronauts traveling on the ISS showed that their brains had somehow been “replenished.” Appeared in the study Frontier in the neural circuit.

Effects of weight loss on the brain

For this collaborative project between the European Space Agency (ESA) And Roscosmos, spending twelve astronauts MRI Before and after their stay in space. To study the structure and function of the brain, a special technique called postoperative MRI trachegraphy was performed that highlighted the nerves in the brain. ” Our research is the first to use this particular method to detect changes in the structure of the brain after space travel. “, Explained Floris Waits, a researcher at the University of Antwerp (Belgium).

Because of the changes, researchers have made several observations of them. First in the motor region of the brain where the connection is Neuron Has changed. ” The motor regions are the centers of the brain where commands Movement Is initiated. In weightlessness, an astronaut must adapt his or her travel techniques to Earth. Our study shows that their brains have recycled, so to speak Andrei Doroshin, the first author of the study, explained. This recycling continues more than seven months after the astronauts returned to Earth.

Corpus callosum, the junction betweenRight and left hemispheresDifferences also emerged among astronauts, but scientists realized that this was not an underlying change in the corpus callosum but Expansion Adjacent cerebral vesicles that compress it a little more than normal.

For muscle and bone mass, understanding cerebral changes due to weight loss may allow for corrective measures, such as fighting them. Melting Muscle. Humanity’s ambition is to spend more time in space and risk this prolonged space journey Put pressure on the human body.

In addition to workshops given by the Society of Neurosciences across France on the origin of Brain Week, Futura highlights our recent scientific advances in ciboulot. A collection of knowledge, psychology or even unusual and extraordinary storiesItemOf Questions and answers And Podcast Under the tag will be available this week Brain Week A And on our social networks!

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