PSYCHOLOGY OF EMOTIONS

Detailed explanation-1: -The alcohol in your system will mean you spend less time in the important Rapid Eye Movement (REM) stage of sleep, 2 with the end result that you wake up feeling less refreshed. Even just a couple of drinks will have an effect.

Detailed explanation-2: -Since alcohol can reduce REM sleep and cause sleep disruptions, people who drink before bed often experience insomnia symptoms and feel excessively sleepy.

Detailed explanation-3: -The onset of the first REM sleep period is significantly delayed at all doses and appears to be the most recognizable effect of alcohol on REM sleep, followed by a reduction in total night REM sleep.

Detailed explanation-4: -Alcohol affects different neurotransmitters and systems in the brain that regulate sleep. It can suppress REM sleep, causing people to wake up after a full night of sleep feeling like they hardly slept at all. It can also make people restless during sleep, more prone to vivid nightmares and symptoms of RBD.

Detailed explanation-5: -Those studies that have demonstrated alcohol-induced REM suppression during the first half of the sleep period also have frequently found an REM rebound (i.e., longer-than-normal REM periods) during the second half of the night (Williams and Salamy 1972).