Sleep and Menopause: Review

Abstract

Sleep consists of REM and non-REM (rapid eye movement) periods that happen cyclically. Each one lasts between 90 to 120 minutes, and in one night there are approximately 4 to 6 cycles. During the first half of the night, non-REM cycles predominate, which are related to physical and mental restitution. On the contrary, in the second half of the night, REM cycles predominate, which participate in mental and emotional functions, including memory [1].