SLEEP

The natural state of rest for human and animals is sleep. Regular sleep is essential for survival. There are two broad types of sleep; rapid eye movement and non-rapid eye movement. The stages of sleep were defined in 1937 by Alfred L. Loomis who determined five stages of sleep from A through E. This covered the full range from deep sleep to wakefulness. This definition has been refined through time and is now ranked as three distinct stages of non-rapid eye movement and one stage of rapid eye movement. In non-rapid eye movement sleep there is little dreaming; rapid eye movement sleep accounts for 20-25% of total sleep time in normal adults and accounts for memorable dreams.

Each stage of sleep has unique characteristics; each stage lasts in humans from 90 to 110 minutes on average and has distinct physiological characteristics. Failure to complete the sleep stages may lead to sleep deprivation and a feeling of tiredness upon waking.

Sleeping pills, alcohol and stress can contribute to disruptive sleep patterns and may increase the feeling of tiredness. The National Sleep Foundation (US) suggests that an adult requires seven to nine hours of sleep. Proper sleep benefits performance, memory, problem solving, health and reduces the possibility of accidents. Some Physicians have attributed some forms of sleep fatigue to sleeping environment such as noise levels, humidity and the particular mattress or bed being used.

There are many ongoing discussions about sleep in the blogosphere. Dr. Michael Breus, Ph.D. and owner of the Insomnia Blog, offers advice and up to date news in the world of sleep and insomnia.

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Latest blogosphere posts tagged “SLEEP”

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  Content Metro — Authority: 129
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  gothinking.net — Authority: 152
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• John Mayer – Heartbreak Warfare Video and Lyrics

  
  HuntHits.com — Authority: 128
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• SOUTH AFRICAN ACTIVIST AND POET DENNIS BRUTUS DIES AT 85 (AFP)

  
  GOSSIP, CELEBRITY NEWS — Authority: 165
  foetoprotein – South individual uranologist and anti-apartheid reformist Dennis Brutus, who campaigned successfully for an athletics forbiddance on the white-rule regime, has died, his kinsfolk declared Sunday. He was 85. View post: (AFP)"> (AFP)">South individual reformist and uranologist Dennis ...
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• MAGSAFE 85W Power Adapter for Apple MacBook Pro – Replacement for Apple 85W Magsafe Power Adapter

  
  Kill Deal — Authority: 177
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• Learn What To Look Out For When Trying To Select The Right Double Down Sleeping Bags

  
  Tired of Insomnia? Rest Easy Tonight... — Authority: 149
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• NYE FUCKING FAIL.

  
  Gossip Candy — Authority: 460
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  GeekSugar — Authority: 638
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• My Mommy Got Me A New Pillow For Christmas. Fluffy.

  
  That Blue Yak — Authority: 128
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• Sleep Apnea Symptoms Can Be Harder To Diagnose Than You Believe

  
  InsomniaRest.com — Authority: 131
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• So I was mistaken

  
  Lucky Rabbit's Foot — Authority: 118
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• Procedure To Stop Snoring – Causes & Snoring Cure

  
  InsomniaRest.com — Authority: 131
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• iHome iH4U Alarm Clock for iPod

  
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  pimp my spleen — Authority: 123
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• The Little Sleep Machine

  
  SLEEP Online Magazine - The SLEEP Blog - All about SLEEP, SLEEPING, and SLEEPINESS — Authority: 127
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  California Beaches Blog — Authority: 148
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• The Addiction to Smoke

  
  Healthy Living Living a Healthy Lifestyle — Authority: 120
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• Sleep disorders: When going to bed is a nightmare – Independent

  
  Paranominal — Authority: 159
  Sleep disorders: When going to bed is a nightmareIndependentBut today, he says, its more likely to explain the relatively widespread belief in alien abduction, "People need a logical explanation to reassure …and more »read the full article
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