The small minority of people who do sometimes talk when asleep appear to do so during the NREM or non rapid eye movement phases of their night's total sleep, and do not appear to remember dreaming in connection with what they said.
stage 4
Stage 4
It happens in the 4th stage
Stage 4
They occur during REM sleep, usually in the second half of the night
Sleep paralysis typically occurs during the stage of sleep known as REM (rapid eye movement) sleep.
The rhythmic bursts of brain activity that occur during Stage 2 sleep are called sleep spindles. These are short bursts of brain waves that help in the consolidation of memories and are characteristic of this stage of sleep.
They occur during REM sleep, usually in the second half of the night
sleep spindles
There are 4 stages of sleep: Stage 1, Stage 2, Slow wave sleep, and REM. The stages occur in that order. Stage 1 occurs as you are falling asleep, and REM occurs last and contains the craziest dreams. REM is the most difficult to awaken from, so it is likely the stage that you have heard referred to as 'deep sleep'.
Bedwetting, or nocturnal enuresis, is most likely to occur during Stage 3 or Stage 4 of non-REM sleep, which is deep sleep. During these stages, the brain may not respond to signals from the bladder indicating the need to urinate, leading to involuntary bedwetting.
Snoring typically occurs during the deeper stages of sleep, known as REM (rapid eye movement) sleep.