My sweet canvas by KAMORAH RYHLICK https://padlet.com/kryhlick001/q9hsoid5y2ra Made with whimsy en-us 2019-03-04 15:12:30 UTC 2019-03-06 02:05:14 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Alarmclock.png Source 1 Stages of sleep kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337495745 Cherry, Kendra, and Steven Gans. “The 4 Stages of Sleep (NREM and REM Sleep Cycles).” Verywell Health, Verywellhealth, www.verywellhealth.com/the-four-stages-of-sleep-2795920.]]> 2019-03-04 15:15:43 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337495745 Note: origin kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337497967 “During the 1950s, a graduate student named Eugene Aserinsky used this tool (EEG) to discover what is known today as REM sleep.”]]> 2019-03-04 15:19:51 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337497967 Note: Tid Bit kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337501921 At the early stages of sleep the brain releases beta waves, which are small and fast. In the later stages when the brain starts to relax and claim down it starts to release alpha waves, which are slower waves. ]]> 2019-03-04 15:26:19 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337501921 Note: Tyes of sleep kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337502602
“There are two main types of sleep:


  1. Non-rapid eye movement (NREM) - also known as quiet sleep
  2. Rapid eye movement (REM) - also known as active sleep or paradoxical sleep”
]]> 2019-03-04 15:27:26 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337502602 Note: NREM Stage 1 kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337504013
NREM Stage 1 

Stage 1 is the beginning of the sleep cycle and is a light stage of sleep. a transition period between wakefulness and sleep.
In Stage 1, the brain produces high amplitude theta waves, which are very slow brain waves.
Period lasts  around five to 10 minutes).
If you awaken someone during this stage, they might report that they were not really asleep.

]]> 2019-03-04 15:29:47 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337504013 Note:NREM Stage 2 kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337505848 During stage 2 sleep:


  • People become less aware of their surroundings
  • Body temperature drops
  • Breathing and heart rate become more regular 
 lasts for approximately 20 minutes. The brain begins to produce bursts of rapid, rhythmic brain wave activity known as sleep spindles. Body temperature starts to decrease and heart rate begins to slow.
 According to the American Sleep Foundation, people spend approximately 50 percent of their total sleep in this stage.

]]> 2019-03-04 15:33:17 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337505848 Note: Stage 3 kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337506798
NREM Stage 3 

During stage 3 sleep:


  • Muscles relax
  • Blood pressure and breathing rate drop
  • Deepest sleep occurs
Deep,slow brain waves known as delta waves begin to emerge during stage 3 sleep. This stage is also sometimes referred to as delta sleep.

During this stage, people become less responsive and noises and activity in the environment may fail to generate a response. It also acts as a transitional period between light sleep and a very deep sleep.



]]> 2019-03-04 15:35:17 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337506798 Note: Tid Bit of Stage 3 kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337932190 Older studies suggested that bed-wetting was most likely to occur during this deep stage of sleep, but some more recent evidence suggests that such bed-wetting can also occur at other stages. Sleepwalking also tends to occur most often during the deep sleep of this stage.

]]> 2019-03-05 14:56:53 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337932190 (Stage 4) REM Sleep kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337935133 During REM sleep:
  • The brain becomes more active
  • Body becomes relaxed and immobilized
  • Dreams occur
  • Eyes move rapidly


Most dreaming occurs during the fourth stage of sleep, known as rapid eye movement (REM) sleep. REM sleep is characterized by eye movement, increased respiration rate, and increased brain activity. 
The American Sleep Foundation suggests that people spend approximately 20 percent of their total sleep in this stage.

]]> 2019-03-05 15:00:43 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337935133 Note: Paradoxial sleep kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337935468 REM sleep is also referred to as paradoxical sleep because while the brain and other body systems become more active, muscles become more relaxed. Dreaming occurs due to increased brain activity, but voluntary muscles become immobilized.]]> 2019-03-05 15:01:13 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337935468 Sequence of sleep kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337937861 It is important to realize that sleep does not progress through these stages in sequence. Sleep begins in stage 1 and progresses into stages 2, and 3. After stage 3 sleep, stage 2 sleep is repeated before entering REM sleep. Once REM sleep is over, the body usually returns to stage 2 sleep. Sleep cycles through these stages approximately four or five times throughout the night.]]> 2019-03-05 15:05:08 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337937861 Note: Time of sleep kryhlick001 https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337938219 On average, we enter the REM stage approximately 90 minutes after falling asleep. The first cycle of REM sleep might last only a short amount of time, but each cycle becomes longer. REM sleep can last up to an hour as sleep progresses.]]> 2019-03-05 15:05:46 UTC https://padlet.com/kryhlick001/q9hsoid5y2ra/wish/337938219