"HOW WE SLEEP"
"During the night, our sleep state alternates between rapid eye movement (REM) and other states (collectively referred to as non-REM). Non-REM sleep is divided into three stages. The first two stages account for light sleep, the third is deep sleep.
For the typical person, it takes about 45 minutes to slip through the first two stages into the last. In these stages most physiological processes are greatly reduced. It’s very difficult to wake a person in deep sleep…"
In October, Thursday 26, at 2:45 pm
Group A-1(3)
You are welcome!