Researchers from the United States found out that young people who have been ill with coronavirus experience changes in the work of their sympathetic nervous system; in particular, their sensitivity to cold decreases, the ScienceAlert portal reports with reference to the work of scientists.
Scientists observed 30 people aged 20 to 24 years for six months. At the same time, 16 of them were infected with the coronavirus. Even in a state of rest, the nerves of those who had been ill with COVID-19 were tenser than those who were not infected. Measuring the electrical activity of the muscles showed that their sympathetic nervous system — the part of the autonomic nervous system that is responsible for the “fight-or-flight” reaction — was overly active. For example, increased activity of sympathetic nerves was observed when the bed with a person was moved from a horizontal position to a vertical one: the person’s heartbeat increased, and the pulse increased.
At the same time, in some cases, the activity of the sympathetic nervous system was reduced. So, when the hands of the participants were immersed in ice water for two minutes, those who had been ill with the coronavirus felt less pain than the control group. The reaction of their neuromuscular apparatus was also calmer.