It turns out that in English, “нога затекла” translates to “the leg/foot fell asleep” – as if it “went to sleep.” The process of it coming back to sensation is called waking up.
Scientifically, this is called paresthesia. The process is as follows: due to pressure, the blood flow in areas where nerves are located worsens, and without enough blood, the nerves cannot send signals to the brain. As a result, the brain receives mixed signals, which it cannot correctly interpret, causing a sensation of tingling or numbness. Thus, the cause is inadequate blood supply to the nerves.
Hi, I'm Rauf Aliev. 