So, many of you probably know that as we go to sleep, our brainwaves change and we enter different stages: awake, light sleep, deep sleep and REM, or rapid eye movement.
Moitos de vós sabedes  sen dúbida, que cando imos durmir as ondas cerebrais cambian  e entramos en diferentes fases: vixilia, sono lixeiro, profundo e MOR  ou movementos oculares rápidos.