American scientists have talked about how when a person begins to age. According to their research, with 39 years people have a weakening of motor and cognitive functions.
According to scientists, in 39 years, the body stops producing in the proper amount of myelin, a substance that is in the form of the myelin sheath covering the nerve human cells, protecting them from the most negative impact. By reducing myelin gradually begin to weaken the ability of the person.
Now scientists are studying the details of these processes in the future to find a way to stop them.
The study volunteers, aged 23-80 years. The results showed that the peak production of myelin and human activity occurs at the age of 39 years. Then the body starts the process of termination of production of myelin, and the person begins to age.