When you are sleep for a couple of hours
They occur during REM sleep, usually in the second half of the night
Truly "deep" sleep does not occur during REM sleep. REM sleep is when you are dreaming. It is deeper than light sleep, but not as far down in unconsciousness as "deep" sleep.
Yes. Sleep apnea can occur at any age
REM
Sleep paralysis typically occurs during the stage of sleep known as REM (rapid eye movement) sleep.
stage 4
They occur during REM sleep, usually in the second half of the night
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.
This usually occurs in REM sleep, when dream states occur. It is not necessarily pathological.
sleep spindles
Snoring typically occurs during the deeper stages of sleep, known as REM (rapid eye movement) sleep.
Deep sleep, also known as slow-wave sleep, typically does not occur immediately upon falling asleep. Instead, the sleep cycle progresses through lighter stages of sleep before reaching deep sleep, usually within the first hour after falling asleep. Factors such as sleep quality and individual differences can influence how quickly a person enters deep sleep.