Sleep is a naturally recurring state of mind and body, characterized by altered consciousness, relatively inhibited sensory activity, reduced muscle activity and inhibition of nearly all voluntary muscles during rapid eye movement (REM) sleep, and reduced interactions with surroundings. It is distinguished from wakefulness by a decreased ability to react to stimuli, but more reactive than a coma or disorders of consciousness, with sleep displaying different, active brain patterns. Sleep occurs in repeating periods, in which the body alternates between two distinct modes: REM sleep and non-REM sleep. Although REM stands for "rapid eye movement", this mode of sleep has many other aspects, including virtual paralysis of the body. A well-known feature of sleep is the dream, an experience typically recounted in narrative form, which resembles waking life while in progress, but which usually can later be distinguished as fantasy. During sleep, most of the body's systems are in an anabolic state, helping to restore the immune, nervous, skeletal, and muscular systems; these are vital processes that maintain mood, memory, and cognitive function, and play a large role in the function of the endocrine and immune systems. The internal circadian clock promotes sleep daily at night. The diverse purposes and mechanisms of sleep are the subject of substantial ongoing research. Sleep is a highly conserved behavior across animal evolution.Humans may suffer from various sleep disorders, including dyssomnias such as insomnia, hypersomnia, narcolepsy, and sleep apnea; parasomnias such as sleepwalking and rapid eye movement sleep behavior disorder; bruxism; and circadian rhythm sleep disorders.
Related Searches

If you like sleep, try these related items.

Similar Topics

Customers looking for sleep also searched for:

Sponsored Links
Banner 1
Micro Electric CPAP Noise Anti Snoring Device Sleep Apnea Stop Snore Aid Stopper
Micro Electric CPAP Noise Anti Snoring Device Sleep Apnea Stop Snore Aid Stopper
Price:
12.98 USD
Ends:
Oct 07, 02:27 am
Magnesium Glycinate 350 mg For Improved Sleep, Stress & Anxiety Relief
Magnesium Glycinate 350 mg For Improved Sleep, Stress & Anxiety Relief
Price:
9.85 USD
Ends:
Oct 06, 04:53 pm
Kirkland Signature Sleep Aid, 192 Tablets
Kirkland Signature Sleep Aid, 192 Tablets
Price:
9.95 USD
Ends:
Sep 28, 07:08 am
3D Sleep Mask For Men & Women Eye Mask For Sleeping Blindfold Travel Accessories
3D Sleep Mask For Men & Women Eye Mask For Sleeping Blindfold Travel Accessories
Price:
10.99 USD
Ends:
Sep 27, 06:36 pm
B-Triad Extra Strength Sleeping Pills/Stress Relief Timed Release Tabs Sleep Aid
B-Triad Extra Strength Sleeping Pills/Stress Relief Timed Release Tabs Sleep Aid
Price:
14.99 USD
Ends:
Oct 02, 08:36 pm
811 Women Nightgown Sleepwear Pajamas Short Sleeve Sleep Dress Nightshirt
811 Women Nightgown Sleepwear Pajamas Short Sleeve Sleep Dress Nightshirt
Price:
14.99 USD
Ends:
Oct 02, 05:42 pm
Magnesium Glycinate Chelated 400mg 270 Tablets Vegan, Sleep, Stress Relief
Magnesium Glycinate Chelated 400mg 270 Tablets Vegan, Sleep, Stress Relief
Price:
22.97 USD
Ends:
Sep 25, 11:15 am
Melatonin Gummies 12mg, Extra Strength Sleep Aid Gummy for Natural Sleep Support
Melatonin Gummies 12mg, Extra Strength Sleep Aid Gummy for Natural Sleep Support
Price:
14.82 USD
Ends:
Sep 22, 07:42 pm
Melatonin 10mg Fast Dissolve Tablets - Sleep Aid, 360 Cherry Flavored Tablets
Melatonin 10mg Fast Dissolve Tablets - Sleep Aid, 360 Cherry Flavored Tablets
Price:
19.97 USD
Ends:
Oct 04, 05:13 pm
Natural Deep Sleep Supplement - Melatonin 10 mg, Sleep Aid - Deeper Nights Rest
Natural Deep Sleep Supplement - Melatonin 10 mg, Sleep Aid - Deeper Nights Rest
Price:
9.00 USD
Ends:
Oct 12, 06:04 pm
Natrol MELATONIN 10 mg 60ct 2 Pack FAST DISSOLVE Tablets Sleep Aid Citrus
Natrol MELATONIN 10 mg 60ct 2 Pack FAST DISSOLVE Tablets Sleep Aid Citrus
Price:
9.99 USD
Ends:
Oct 13, 08:46 am
2 Pack Travel 3D Eye Mask Sleep Soft Padded Shade Cover Rest Relax Blindfold
2 Pack Travel 3D Eye Mask Sleep Soft Padded Shade Cover Rest Relax Blindfold
Price:
4.95 USD
Ends:
Oct 14, 02:47 pm
Natrol Melatonin 5 mg Sleep Aid 250 Fast Dissolve Tablet Strawberry EXP 02/2023
Natrol Melatonin 5 mg Sleep Aid 250 Fast Dissolve Tablet Strawberry EXP 02/2023
Price:
10.99 USD
Ends:
Oct 14, 03:42 am
Anti-Snore Wristband Snore Stopper Sleep Connection Bracelet Device Snoring USA
Anti-Snore Wristband Snore Stopper Sleep Connection Bracelet Device Snoring USA
Price:
10.31 USD
Ends:
Sep 27, 12:23 am
 Eye Mask Beauty Sleep Satin Light Blocker Sensual Blindfold Day Night Relaxing
Eye Mask Beauty Sleep Satin Light Blocker Sensual Blindfold Day Night Relaxing
Price:
1.99 USD
Ends:
Sep 20, 11:58 pm
Kirkland Signature Sleep Aid Doxylamine Succinate 25 Mg 2 Bottles X 96 Tabs
Kirkland Signature Sleep Aid Doxylamine Succinate 25 Mg 2 Bottles X 96 Tabs
Price:
10.95 USD
Ends:
Oct 05, 03:55 pm
Anti Snoring Device CPAP Sleeping Aid Apnea Stop Snore Stopper Nose Machine Blue
Anti Snoring Device CPAP Sleeping Aid Apnea Stop Snore Stopper Nose Machine Blue
Price:
9.49 USD
Ends:
Sep 19, 02:26 am
2 Pack Travel 3D Eye Mask Sleep Soft Padded Shade Cover Rest Relax Blindfold USA
2 Pack Travel 3D Eye Mask Sleep Soft Padded Shade Cover Rest Relax Blindfold USA
Price:
6.49 USD
Ends:
Sep 21, 03:53 am
Natrol Advanced Sleep Melatonin Tablets 10mg 120 Count Citrus Melatonin 10mg
Natrol Advanced Sleep Melatonin Tablets 10mg 120 Count Citrus Melatonin 10mg
Price:
9.99 USD
Ends:
Oct 05, 10:01 pm
Balance Breens Melatonin 20mg Night time sleeping Aid Fast Dissolve Berry Flavor
Balance Breens Melatonin 20mg Night time sleeping Aid Fast Dissolve Berry Flavor
Price:
14.99 USD
Ends:
Oct 08, 01:33 pm