You return to stage 3, then stage 2 (delta sleep) before going to REM sleep (stage 5).
You return to stage 3, then stage 2 (delta sleep) before going to REM sleep (stage 5).
You return to stage 3, then stage 2 (delta sleep) before going to REM sleep (stage 5).
3,4. Both stages are now combined and are just called stage 3, SWS ( slow wave sleep) or deep sleep. Stage 3 is the deepest stage.
There is alpha or stage one sleep, theta or stage two sleep, delta or statge 3 sleep, and alpha with REM (stage 4 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.
Stage 4 sleep. Stage 3 also often emits delta waves.
It happens in the 4th stage
Delta waves and low levels of physiological activity are characteristic of deep non-REM sleep. These slow brain waves are associated with the deepest stages of sleep where the body is at its most restorative and rejuvenating state.
REM is during stage 3 and 4 where most of the dreaming occurs.
They occur during REM sleep, usually in the second half of the night
The deepest stage of sleep is REM or Rapid Eye Movement.