How weightlessness affects the muscles and nerves of people

(ORDO NEWS) — A team of researchers from Doshisha University in Japan was able to study the response of the human neuromuscular system to weightlessness, the work was published in the journal Neuroscience & Biobehavioral Reviews.

The scientists analyzed computer models of humans and rodents. In their analysis, they found that weightlessness inhibits the activity of the back muscles that support our spine.

This leads to remodeling of sarcomeres (the basic contractile unit of striated muscles), a decrease in their number and, as a result, to a decrease in the strength of the spinal muscles.

The researchers also noticed a decrease in the amplitude of electromyograms in the spinal muscles – this suggests that weightlessness affects not only the muscles, but also the nerves.

According to scientists, life in zero gravity causes a deterioration in the motor function of the brain. This explains the walking difficulties experienced by crews after spaceflight.


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