We now know that generally speaking, there are three stages of sleep: light sleep, rapid eye movement or REM and deep sleep. We measure these stages by connecting electrodes to the scalp, chin and chest.
Ahora sabemos que, en general, hay tres etapas de sueño: sueño ligero, movimiento ocular rápido o REM y sueño profundo Medimos las etapas conectando electrodos al cuero cabelludo, barbilla y pecho.