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• MadSci Network: Medicine Re: Sleep Deprivation. ...
• html NHRC Sleep and Sleep Deprivation Studies Publications --------------------------------------------------------------------------- - 98-9 Makeig, S; T-P Jung, C Humphries, T-W Lee, MJ McKeow, V Iragui, TJ Sejnowski Removing Electro Encephelographic Artifacts by Blind Source Separation 98-20 Williams, D; J Streeter & T Kelly Fatigue in Naval Tactical Aviators 97-23 Hurtado, S; LK Trent & SA Frack Relationships among Changes in Health Behavior in a Six-Year U. ... Navy Cohort 96-39 Bulbulian R; JH Heaney, CN Leake, AA Sucec & NT Sjoholm The Effect of Sleep Deprivation and Exercise Load on Isokinetic Leg Strength and Endurance 96-41 Kelly, TL; D Ryman & S Pattison A Comparison of Two Navy Watch Schedules 96-42 Kelly TL; DF Neri, JT Grill, D Ryman, PD Hunt, DJ Dijk, J Mitchell, TL Shanahan & CA Czeisler Circadian Rhythms in Submariners Scheduled to an 18-Hour Day 95-5 Elsmore, TF; FW Hegge, P Naitoh, TL Kelly, & D Ryman WinCD: Windows Software for Complex Demodulation. 95-6 Elsmore, TF; FW Hegge, P Naitoh, TL Kelly, K Schlangen, & S Gomez A Comparison of the Effects of Sleep Deprivation on Synthetic Work Performed and a Conventional Performance Assessment Battery. ... 95-14 Kelly, TL; SA Gomez, DH Ryman, K Schlangen, & T Elsmore The Effects of Pemoline on Performance and Mood During Sleep Deprivation. 94-18 White, JL; DF Darko, SJ Brown, JC Miller, R Hyduk, T Kelly, & MM Mitler Early Central Nervous System Response to HIV Infection: Sleep Distortion and Cognitive-Motor Decrements 94-19 Bonnett, MH; S Gomez, O Wirth, & DL Arand (1995) The Use of Caffeine Versus Prophylactic Naps in Sustained Performance. 94-23 Kelly, TL; R Hyduk, & D Ryman The Effect of Bright Light and LEET On Sleep After a 10-Hour Phase Delay. ... (1995) Sleep During SEAL Delivery Vehicle (SDV)/Dry Dock Shelter Exercises Analyzed by a Graphic Approach. ... 94-5E Kelly, TL; MR Rosekind, & P Naitoh Sleep Management Manual. 93-14 Assmus, JD; C Gillen, TL Kelly, S Brown, F Bloom, P Naitoh, & MM Mitler Quantitative EEG Analysis of Sleep Chronophysiology: A Comparison Between Root Mean Square (RMS) Estimation and Fast Fourier Transformation (FFT). ... 93-32 Naitoh, P & TL Kelly (1994) Modification of Multiple Sleep Latency Test (MSLT). ... 92-28 Naitoh, P & T Kelly (1993) Sleep Management User's Guide for Special Operations Personnel.

• The Effects of Sleep Deprivation on Brain and Behavior .
• Sleep deprivation is a commonplace occurrence in modern culture. ... This results in either extended periods of wakefulness or a decrease in sleep over an extended period of time. While some people may like to believe that they can train their bodies to not require as much sleep as they once did this belief is false (1). Sleep is needed to regenerate certain parts of the body, especially the brain, so that it may continue to function optimally. After periods of extended wakefulness or reduced sleep neurons may begin to malfunction, visibly effecting a person's behavior. ... Certain stages of sleep are needed for the regeneration of neurons within the cerebral cortex while other stages of sleep seem to be used for forming new memories and generating new synaptic connections. The effects of sleep deprivation on behavior have been tested with relation to the presence of activity in different sections of the cerebral cortex. ...
• However, in sleep deprived subjects there is no activity within this region (3), (4), (5). The effects of this inactivity can be observed by the slurred speech in subjects who have gone for prolonged periods with no sleep (6). ...
• Even severely sleep deprived people are still able to perform to some degree on a verbal learning test. ... Still, sleep deprived people do not perform as well on these tests as do fully rested subjects (3), (4). One possible reason for the poorer performance after missing sleep, aside from unregenerated neurons, could be the fact that since the parietal lobe is not usually used to performing tasks such as these it is not as adept at carrying them out. ... Interestingly, sleep deprived subjects have been shown to have better short-term memory abilities than their well-rested counterparts (6). Since memory is associated with this region of the cerebral cortex the fact that it is already active in sleep deprived people could make it easier for new synapses to be created, thus forming new short-term memories more easily. ...
• While activity is seen within the parietal lobes of rested people as they think through math problems no corresponding activity is visible within the brains of sleep-deprived subjects. Also, no new area of the brain becomes active while the sleep deprived people work on math problems. Since sleep deprived people can still complete math problems, albeit with less speed and accuracy than a well-rested individual, this data implies that a region of the brain already in use is used for this task (1). ...

• Sleep Disorder.
• This is an educational, non-commercial site devoted to improving sleep health worldwide.
• NEW over 400 Definitions and Abbreviations used in sleep. ...
• If you suspect that you have a sleep disorder you should seek care from a qualified professional. ...

• Types of Sleep Deprivation .
• REM Sleep Deprivation .
•     The most notable finding from REM deprivation studies in humans is that the number of attempts that a person makes to go into REM while asleep greatly increases.   After the deprivation is complete, the deprived person will experience a REM rebound, which is a significant increase in the percentage of time spent in REM over normal levels. ... REM deprivation in humans is associated with a significant increase in stage 1 NREM during the deprivation period.   Levels of stage 2 and 4 sleep remain relatively normal. ...
•     The initial REM deprivation study done by William Dement was reported in an article entitled “The Effect of Dream Deprivation”.   Dement choose this title because at that time the relationship between dreams and NREM sleep was not clear, while dreams and REM tended to strongly correlate together.   We now know that REM deprivation and dream deprivation are not synonymous. ...   Studies including REM deprivation since Dement’s have reported participants experiencing confusion, suspicion, withdrawal, and being “less well integrated and less interpersonally effective”. ...
•     A crucial methodological point is that over the course of 4 nights REM deprivation, the authors estimated that the deprivation eliminated 65-75% of REM.   The reason that so much REM (up to 1/3 of the normal amount of REM) was still experienced by participants was because once a person enters REM, it may take some time to identify that stage of sleep as REM. ...
•     While several studies suggest that REM deprivation can have adverse consequences, there are a number of studies that fail to confirm these findings.   The most accepted position currently is that REM deprivation is not deleterious, and can even be beneficial.   After it was demonstrated that REM deprivation did not produce mental instability, a question was raised concerning any positive consequences of REM deprivation.   The following pieces of evidence suggest a link between depression and REM: Some symptoms of depression (decreased interest in sex and general pleasure seeking activity, decrease in aggression, and possibly decrease in eating) are opposite those of REM deprivation, which tends to produce “an excitability in the brain substrate for drive-related behavior”. ...

• The Individual and Combined Effects of Alcohol Consumption and Sleep Deprivation on Cognitive Functioning.
• Sleep deprivation and alcohol consumption affect cognitive abilities both separately and simultaneously. Surprisingly, though the effects of alcohol intoxication and sleep deprivation are generally similar when observed singularly, however when combined, the effects are varied based on blood alcohol content and length of sleep deprivation. ...
• Sleep Deprivation and Cognitive Abilities.
• There has been much discussion in the past few years concerning the effects of sleep deprivation on every day functioning. One group which may be affected by lack of sleep is children, since most schools start early in the morning, standardized tests are given early in the morning, etc. which may prevent a good night’s sleep. ...
• In 1998, a study was done to examine the effects of a night of acute sleep restriction on cognitive function (Randazzo, Muehlbach, Schweitzer, & Walsh, 1998). A sleep-deprived group was only allowed 5 hours in bed, and the control group was allowed 11 hours in bed. The study found that in tasks requiring repetition and less creativity, sleep deprived children scored similarly to the control group of students. However, it also concluded that "even 1 night of restricted sleep resulted in cognitive deficits in children; specifically, verbal creativity and abstract thinking/concert formation were affected" (Randazzo, et al. ... The team of researchers believes their study suggests that the area most affected by sleep deprivation in children is executive function. ... Their findings also suggest that the area of the brain that is most affected by sleep deprivation is the frontal lobe, since that is where executive function occurs.
• Long periods without sleep are shown to have an effect on cognitive functioning, but sleep deprivation can be adapted to if moderate restriction occurs on a nightly basis (Dinges, et al. ... A psychomotor vigilance task performed by 16 young adult subjects whose sleep was restricted to between 4 and 5 hours per night showed that lapses increased dramatically after two nights of sleep restriction. ... It was not until the seventh night of sleep restriction that the number of lapses increased again. This suggests that cognitive functioning is adapted to the amount of sleep a person normally receives (Dinges, et al. ...

• Sleep Deprivation.
• Black-Out Curtains - a Cure for Sleep Deprivation .
• A major health concern facing all modem societies is sleep deprivation.
• It is estimated that 33% of the population suffer from lack of sleep.
• The causes of sleep deprivation are numerous but a major factor is too much light in a room where people are trying to sleep. ...
• More than 90 million people suffer from lack of sleep.
• Nearly 250,000 motor accidents are caused by lack of sleep.
• 40,000 fatal heart attacks a year are caused by sleep apnoea.
• It is an undisputed fact that very many industrial and commercial accidents and errors are caused by lack of sleep. Estimates of the cost of this sleep deprivation World-wide runs to hundreds of billions of US Dollars.
• Daylight in a room is not the only reason people do not sleep well, but it is a major contributor.
• For the first two nights there was just calico over the windows and they were woken by daylight before 6-OOam which is not good when you are on holiday! Then Richard hung some Thermo Suede black-out lining up and they both slept through until 7-45am - nearly two hours extra sleep" If you want to know more then send Richard an email or give him a call.

• Browse : By Condition : By Disease Heading : Behaviors and Mental Disorders : Sleep Deprivation.
• Conditions: Sleep Initiation and Maintenance Disorders; Sleep Deprivation.
• Comparing Tai Chi Training to a Low-Stress Physical Activity to Enhance Sleep in Older Adults.
• Conditions: Sleep Deprivation; Sleep Initiation and Maintenance Disorders.
• Activating Effects of Sleep Deprivation on Synchronized MEG-EEG Recordings of Epilepsy Patients with Non-Diagnostic EEG.

• 'How much Sleep do we need ?'.
• the same applies to sleep. ...
• An extreme example of the human ability to sleep excessively comes from the Inuit (Eskimos), who until the fifties, endured the perpetual and tedious Arctic winter nights by sleeping for 14 hours a day, compared with around six hours daily during the continuous summer light. Despite the eight-hour seasonal difference, the Inuit did not suffer from sleep deprivation in the summer, as the key sign of insufficient sleep - excessive daytime drowsiness - was absent. Nowadays, having adopted a Western way of life, they maintain a constant seven to eight hours of daily sleep throughout the year.
• They assert that because most of us can extend our daily sleep, we must need to do so. This would mean that people who seem content with seven and a half hours of sleep a day during the week but enjoy nine hours at the weekend are, unknowingly, chronically deprived, and actually need nine hours every day. ...
• However, this has little to do with requiring nine hours of daily sleep. Most of these tired people sleep for fewer than six hours because they are shift workers, or combine long work hours with running a home, or simply because they are socialising at night or watching too much late-night television. Many of the driving accidents caused by people falling asleep at the wheel happen in the early morning, throught drivers having had little or no sleep at all.
• The reasons are unclear and could be due to underlying illnesses unrelated to sleep. ... They might also be more stressed and desire more sleep.
• Age for age, Americans seemed to sleep up to one and a half hours longer per day. ...
• The Victorians regarded sleep as an indulgence to be frowned upon. ... Some 50 years earlier, Napoleon Bonaparte, who was not a good sleeper, had advocated 'six hours sleep for a man, seven for a woman and eight for a fool,' reflecting the common view that around seven hours was adequate. ... At the Sleep Research Laboratory at Loughborough University, our recent study involving 400 men and women, aged 20 to 70 years, sleeping at home, found that women generally slept an average of seven-and-a-half hours daily, about 15 minutes longer than men.

• Sleepy, Dopey And Doc — Sleep Deprivation And Physicians .
• , RPsgt is Clinical Director of the Florida Center of Sleep Medicine, Inc. ...
• Sleep is that mysterious thief that consumes one third of our lifetime. We take sleep for granted and assume that it naturally occurs at night when we close our eyes. ... Recognizing that sleep deprivation is a problem and that it can have serious implications is a challenge for the medical profession. ... It is believed that he was a short sleeper claiming "For myself I never found need of more than four or five hours sleep in the twenty four. " He was convinced that sleep made people lazy and stupid. ...
• The sub speciality of Sleep Disorder Medicine and the effects of the disorders has become the talk of the town in most areas except in the medical field itself. The impact of sleepiness is ignored out of hand by many physicians and health care workers until that ill-fated instant when we recognize the avoidable mistake that has occurred due to sleep related fatigue. ... Sleep deprivation leads to sleep debt accumulation and effects mood,motivation, attention, alertness, short-term memory, ability to complete routine task, task performance and physical performance. ...
• Sleep deprivation is a non biased, non selective, non addictive disorder of impairment, unlike alcohol and drug addiction. ... Emergency personnel such as firemen and police officers as well as industrial workers and transportation operators are subjected to job demands where considerable accumulation of sleep debt is the rule. ...
• There are many things about medical practice that complicate accommodating the needs for adequate sleep and getting the job done. Physicians often avoid their own advice and tend not to take sleep deprivation seriously. ... Sleep deprivation in it's many forms takes a high toll on the medical profession each year. The intense levels of stress from the profession magnifies the impact of sleep deprivation on the higher levels of cognitive functioning such as decision making. ... In the United States we continue to equate laziness with the need for sleep just as Edison did. ...

• sleep deprivation.
• Sleep deprivation and performance.
• It may seem obvious to suggest that sleep deprivation has a deleterious effect on anaerobic performance – or, indeed, on performance of any kind. ...
• Reduced performance following sleep disturbance could be caused by a disruption to the body’s circadian rhythms – physiological variables that fluctuate over the course of a 24-hour period. ...
• In the French study, a group of 13 male subjects performed two 30-second power test sessions on a cycle ergometer after 24 and 36 hours without sleep (at 6am and 6pm). For purposes of comparison, they also performed the same tests at the same time after a good night’s sleep. ...
• As expected, peak, mean and maximal power production were higher at 6pm than at 6am, irrespective of the previous night’s sleep pattern, suggesting the overriding influence of a circadian rhythm. ...
• Impaired performance of brief high-intensity exercise after 36 hours of sleep loss has not been demonstrated in previous studies, and the French researchers offer several possible explanations for their findings: .
• Power production may itself follow a rhythmic cycle that is affected by sleep deprivation; .
• A change in the circadian rhythm of arousal, caused by sleep deprivation, may have resulted in reduced levels of motivation in the evening; .
• Sleep loss resulted in a slight phase advancement in body temperature, such that peak temperature no longer coincided with the evening test session. ...
• These findings reinforce the need for a good night’s sleep before anaerobic competition – particularly where morning heats are followed by finals in the late afternoon. ...
• sleep deprivation.

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• sleep deprivation and insomnia tips - sleep aids reviews .
• Sleeping Tips - Strategies, tips and techniques you can use to finally put an end to insomnia and sleep deprivation .
• Sleep Deprivation Tips - Bookmark This Page For Future Reference .
• sleeping tips/home      memory foam for better sleep      improve sleep with natural sounds     .
• How To Cope With Sleep Deprivation, Disorders And Insomnia.
• Sleep deprivation and insomnia are a common occurance. About half of Americans report problems at least occasionally, and the same number are diagnosed with a disorder according to National Sleep Foundation surveys. ...
• There are many things you can do to deal with insomnia and sleep deprivation. ... As you begin to see the connection between, for example, what/when you eat and nights of poor sleep, you can develop your own good sleep plan. ...
• Secrets To Beating Sleep Deprivation And Insomnia.
• Diet, health and sleep deprivation .
• Diet, health and sleep deprivation.
• We constantly eat and drink without thinking about they might be contributing to our sleep deprivation. ... But that same drink is an enemy to sleep. ...
• How to determine caffeine's effect on you and whether it's causing your sleep deprivation? Try eliminating caffeinated food and drink after lunch for a few weeks. Are you sleeping better? Is your sleep deprivation in check? If so, you may have identified the culprit. ...

• Journal SLEEP.
• Official Publication of the Associated Professional Sleep Societies, LLC .
• A joint venture of the American Academy of Sleep Medicine.
• and the Sleep Research Society.
• The Cumulative Cost of Additional Wakefulness: Dose-Response Effects on Neurobehavioral Functions and Sleep Physiology From Chronic Sleep Restriction and Total Sleep Deprivation.
• 1Unit for Experimental Psychiatry, Division of Sleep and Chronobiology, Department of Psychiatry, and Center for Sleep and Respiratory Neurobiology, University of Pennsylvania School of Medicine; 2Beth Israel Deaconess Medical Center and Harvard Medical School .
• Objectives:To inform the debate over whether human sleep can be chronically reduced without consequences, we conducted a doseresponse chronic sleep restriction experiment in which waking neurobehavioral and sleep physiological functions were monitored and compared to those for total sleep deprivation.
• Design:The chronic sleep restriction experiment involved randomization to one of three sleep doses (4 h, 6 h, or 8 h time in bed per night), which were maintained for 14 consecutive days. The total sleep deprivation experiment involved 3 nights without sleep (0 h time in bed). Each study also involved 3 baseline (pre-deprivation) days and 3 recovery days. ...
• Interventions:Nocturnal sleep periods were restricted to 8 h, 6 h or 4 h per day for 14 days, or to 0 h for 3 days. All other sleep was prohibited.
• Results:Chronic restriction of sleep periods to 4 h or 6 h per night over 14 consecutive days resulted in significant cumulative, dose-dependent deficits in cognitive performance on all tasks. Subjective sleepiness ratings showed an acute response to sleep restriction but only small further increases on subsequent days, and did not significantly differentiate the 6 h and 4 h conditions. Polysomnographic variables and d power in the non- REM sleep EEG—a putative marker of sleep homeostasis—displayed an acute response to sleep restriction with negligible further changes across the 14 restricted nights. Comparison of chronic sleep restriction to total sleep deprivation showed that the latter resulted in disproportionately large waking neurobehavioral and sleep d power responses relative to how much sleep was lost. A statistical model revealed that, regardless of the mode of sleep deprivation, lapses in behavioral alertness were nearlinearly related to the cumulative duration of wakefulness in excess of 15. ...

• Preventing Sleep Deprivation.
• Eliminating the need for sleep during an operation, while maintaining the high level of both cognitive and physical performance of the individual, will create a fundamental change in warfighting and force employment. ...
• The goal of the Preventing Sleep Deprivation Program is to identify approaches that extend the performance envelope of the warfighter. The capability to resist the mental and physiological effects of sleep deprivation will fundamentally change current military concepts of OPTEMPO and contemporary orders of battle for the military services. This program will develop a number of different strategic approaches to prevent the effects of sleep deprivation over an extended period of time, nominally set at 7 days (24/7). ... In short, the capability to operate effectively, without sleep, is no less than a 21st century revolution in military affairs that results in operational dominance across the whole range of potential U. ...

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• Researchers find that sleep deprivation or excess in women may be associated with increased risk of coronary artery disease.
• Researchers at Brigham and Womenâ ™s Hospital (BWH) have found that both long and short sleep durations may be independently associated with an increased risk of heart disease in women. ...
• "There have been several studies examining the impact of short duration sleep deprivation, however, our research is one of the first to hypothesize that sustained reduced sleep duration as well as an excess could negatively impact a womanâ ™s cardiovascular health," said Najib Ayas, MD MPH, of BWH. ...
• Chronic sleep deprivation is common in todayâ ™s society. It is reported that a third of Americans sleep six or less hours per day. Previous research has shown that the effects of short-term reduced sleep duration include increased blood pressure, heart rate variability, decreased glucose tolerance and increased cortisol levels. Yet, little is known about how the duration of sleep impacts long-term health outcomes, such as oneâ ™s risk of CHD, the number one killer of both men and women in the U. ... BWH researchers have now revealed sleep may weigh into that equation, too.
• "Our study suggests that curtailing sleep may have adverse cardiovascular consequences," said Ayas, also of Harvard Medical School. ... Adequate daily sleep should not be considered a luxury, but an important component of a healthy lifestyle. ...
• Overall, the research establishes an important link between sleep and cardiovascular health, although more research is required to better understand the biological mechanisms underlying this correlation. With prior knowledge about the debilitating influence of short-term sleep deprivation, the association revealed between chronic sleep deprivation and increased risk of CHD was consistent with research teamâ ™s original hypothesis. However, unexpectedly, the data also showed that increased sleep duration - nine or more hours of sleep - was also associated with an increased risk of CHD. ... The reason for the positive relationship between increased sleep duration and CHD remains elusive at the present time.
• "While further investigation will pinpoint the causes, we now know that the quantity of sleep women are getting - whether it is too much or too little - seems to be an important factor in maintaining a healthy heart," noted Ayas.

• PERSONALITY CAN ALTER THE EFFECTS OF SLEEP DEPRIVATION.
• effects of sleep depravation on cognitive performance, according to findings presented .
• at the 13th Annual Meeting of the Associated Professional Sleep Societies. ...
• personality type and the effects of sleep deprivation on a variety of tasks. ...
•    Overall, sleep deprivation had a significant negative effect on time estimation, immediate.
• that examined memory and recall were sensitive to the effects of sleep depravation.
• affected by sleep deprivation and on the finger-tapping task. " As the amount of sleep .
• deprivation increased, so did these differences between introverts and extraverts; .
•    There was also a significant three-way interaction between sleep deprivation, .

• Sleep Deprivation.
• An INIT that clears your screen with a cool graphic effect every time you put your Mac to sleep. ...
• Download Sleep Deprivation 1. ...
• Sleep Deprivation 1. 1 clears the screen with a cool graphic effect every time you put your Mac to sleep. ...
• You are here: Home → Projects → Classic Mac Archive → Sleep Deprivation .

• As a result, a good night's sleep is increasingly missing from teenagers' frantic lives, researchers agree.
• By the time Monday rolls around, their sleep patterns shift dramatically to meet such early school schedules.
• Such erratic sleep patterns have long been considered the result of cultural pressures - you know, it's cool to stay up late chatting with friends or watching the latest episode of "Friends. ...
• But now, it is the severity and prevalence of teens' sleep deprivation that is causing a growing concern among researchers, educators and parents.
• , found that 85 percent were chronically sleep-deprived and accumulated a minimum 10-hour sleep deficit during the week. ...
• next > how much sleep do teens need? .
• SLEEP INTERNATIONAL.
• The discussion of adolescent sleep patterns has captured the interest of sleep researchers around the world.
• Researchers from Rome and Brazil checked in at a 1997 think-tank on adolescent sleep patterns at UCLA.
• A survey of 6,632 14- to 20-year-olds in Rome found significant changes in sleep patterns as children grew into adolescence.
• In Sao Paulo, researcher Miriam Andrade found that the 99 female high school students surveyed (ages 14 to 16) awoke two hours earlier on weekdays than on weekends and that they went to sleep later than the 12 to 13-year-olds similarly surveyed.
• The greater prevalence of sleep complaints found in the shorter sleepers - whose school day began at 7:1 5 a. ... - "evinces the school day sleep restriction consequences," according to Andrade.

• A prominent sleep researcher says staying awake may be overrated.
• Specialty: Adult and adolescent sleep patterns. ...
• There is also this ethic that we're stronger than our need to sleep. ... The Challenger commission report indicated a possible relationship between their lack of sleep and the impaired judgment that led to disaster.
• How does lack of sleep affect our non-working lives?.
• Sleep may play a major role in, among other things, regulating mood and emotion. Most studies done on sleep deprivation look at performance, ability to think, reaction time. ... Sleep deprivation is not the root cause of these problems, but the extent to which it contributes may be underestimated. ...
• Is there a minimum amount of sleep we should be getting?.
• The need for sleep varies like most biological functions, but you can fit the differences among virtually all adults in about an hour's span. It's likely that people who, in casual conversation, say they're fine on four or five hours a night have been acculturated to not value sleep or what sleep does for them. ...
• People are not good at perceiving their own sleep debt. Someone may say they got four hours of sleep and they're fine, but if you put them in a low-stimulus environment, like a warm classroom at 4 p. ... But if they make it a point to get eight-and-a-half hours of sleep every night for a week or two, it's as if somebody with astigmatism finally gets glasses. ...
• At what age does this sleep-deprivation habit begin?.
• They end up losing sleep. ...

• Even Mild Sleep Deprivation Harmful .
• Researchers at the Pennsylvania State University in Hershey have studied the effect of varying degrees of sleep deprivation. While severe sleep deprivation has been repeatedly shown to have harmful effects on mental and physical functioning, most scientists believe that mild amounts of curtailed sleep will not do much damage. ...
• Doctors studied 25 young healthy men and women who agreed to spend 12 consecutive days in a sleep laboratory. The first 4 nights, they were allowed to sleep for up to 8 hours. ...
• After a week of mild sleep deprivation, the researchers measured changes in study participants' quality of nighttime sleep, daytime drowsiness, hormonal activity as measured by continuous blood sampling and hourly performance on a vigilance test. ...
• After 1 week of sleep deprivation, the study participants fell asleep faster and slept more deeply during the daytime. The sleep-deprived individuals showed more signs of sleepiness and performed worse on a vigilance test. ... Women tolerated sleep deprivation better than men.  In addition to not producing higher levels of TNF, they were able to sleep more soundly, getting 70 minutes of deep sleep, or rapid eye movement (REM) sleep, compared with the 40 minutes obtained by men. ...
• The study presented at the annual meeting of the Endocrine Society concludes that just a few hours of sleep deprivation could impair daily functioning and affect hormonal levels in the body.  Lack of sleep may stimulate an increase in chronic, low-level inflammatory response which may contribute to conditions such as high blood pressure, heart disease and diabetes.

• Sleep is needed to rejuvenate the body and mind. What is the most important part of sleep? Too little sleep can be very detrimental to your health. ...
• I'm talking, of course about the rejuvenating and soothing activity we call sleep. ...
• Sleep is associated not only with relaxation, regeneration of the body's tissues, and sorting of information accumulated during the day, but sleep also gives us the strength to face each day's worries, concerns, and problems.
• Many psychologists think of sleep as an altered state of consciousness that is an important part of the biological cycle. ... Sleep progresses in a sequence of stages about 90 minutes in length that repeat several times throughout the night. ...
• However, in the later stages, especially once Rapid Eye Movement (REM) sleep sets in, heart and breathing rates rise and eyes begin to dart about sporadically, signifying the beginning of a dreaming period. It is during REM sleep that the brain is most active, with the amount of activity at times reaching waking levels. ...
• The Deepest of Sleep .
• One cannot be easily awakened during REM sleep. ...
• Why do we need sleep? A significant reason seems to be that sleep possesses recuperative powers. During sleep, metabolism is lowered and available resources are diverted to restoration of the body's tissues, especially those of the brain. ... Moreover, sleep also plays a role in the growth process because during sleep the pituitary gland releases a growth hormone.
• While we sleep the brain processes sensory and conceptual information accumulated during the day. ... Dreams seem to fit into the information processing theory of sleep. ...
• How much sleep do we really need? Humans have no absolute daily requirement of sleep. ...

• Lack of Sleep Takes Toll on Brain Power.
• A study using real-time, state-of-the-art imaging shows that sleep deprivation has dramatic effects on the brain and how well it performs.
• They found instead that while parts of the sleep-deprived brains churned with activity during the test, another part of the brain -- the language center -- shut down.
• "Sleep deprivation is bad for your brain when you are trying to do high-level thinking tasks," study co-author J. ...
• Gillin's team at the University of California, San Diego, and the San Diego VA Medical Center found that the brains of some sleep-deprived study participants tried to overcome the language-center shut-down by shifting activity to another part of the brain. These individuals performed better on the memory test than their sleep-deprived peers, but not as well as they did when rested.
• "This shows that the brain can move a task from one area to the other when you are sleep deprived, or when you get old. ...
• Jim Horne, PhD, director of the sleep research laboratory at Loughborough University in England, notes in a commentary accompanying the study that the part of the brain that overworks in the sleep-deprived people normally is one of the most active areas of the brain. ... "Some years ago, we suspected that if sleep offers some sort of recovery process, then the parts of the cortex that work hardest during wakefulness may be those that suffer the deprivation initially," he tells WebMD. ...
• However, Horne says that this part of the brain gets its rest during the earliest stages of sleep. "Not all of sleep is for recovery. A particular part of sleep occurring in the early part of sleep is most important for brain recovery, and the latter part is not so important in that regard," he says. "As we can eat more food than we require and drink more fluids than we require, we may sleep more than we require. Rather than trying to extend one's sleep ? perhaps we should take short naps instead. ...
• So how much sleep does one need, and how should one get it? Horne has an easy answer. "The amount of sleep we require is what we need not to be sleepy in the daytime," he says. ...

• Sleep Deprivation.
• Sleep deprivation becomes a factor in any adventure race that lasts over 18 hours. ...
• Sleep deprivation is the one aspect of an adventure race that is virtually impossible to train for. ... Furthermore, the sleep component or lack thereof, is often one of the most sited reasons for people not being interested in adventure racing. While you may find it hard to train for sleep deprivation, I would recommend structuring your training such that sleep becomes a factor. The reason for this is simple—everyone reacts to a lack of sleep in their own way and some people handle it better than others. Regardless, several symptoms or signs of sleep deprivation are rather common. ...
• The trick is that ideally, everyone does not get hit by the sleep bug all at once. ...
• There are several things you can do to combat the sleep bug. ... Ultimately, your body is telling you that you need sleep and at some point give it at least a taste of the rest it needs.
• In any case, you should try to plan for sleep in races which you expect to last over 18 hours. Obviously the length of the race will determine your sleep plan and even the best laid plans will be modified. My experience is that you will want to sleep a minimum of one hour for every twenty-four hours and you should start your schedule from day one. Do not try to push the first 36 to 48 hours of a race with no sleep as many people have found that their ability to recover is greatly diminished. ...

• Fibromyalgia and Sleep Deprivation: .
• More Information About Sleep .
• Talk About Sleep, a commercial website, offers information about fibromyalgia, support groups and other help as well. The site includes an interactive sleep test, a sleep log, bed partner questionnaire, medication log. ...
• Fibromyalgia Network offers basic information on fibromyalgia as well as information on related sleep disorders, medications and treatments .
• ; September 23, 2002) For adults with fibromyalgia, pills may or may not help resolve the sleep difficulties that challenge many. ...
• And in some cases, a sleep medication may help a person fall asleep but then not help them achieve deep, restorative sleep. ...
• When it comes to sleep for adults with fibromyalgia, pain medications also may interfere with an adult’s ability to sleep. ...
• Common symptoms include sleep disorders and fatigue, according to the Centers for Disease Control and Prevention. ...
• The prescription sleep medication Ambien ® can help induce sleep. Yet, in some cases, it does little to help maintain restorative sleep, said Anne Winkler, M. ...
• Restorative sleep - also known as delta sleep -- is the most crucial stage of sleep. ...
• Without delta sleep, a person with fibromyalgia might sleep eight hours yet wake feeling unrefreshed. ...
• Tips for Good Sleep:.
• Maintain a steady sleep pattern. Don't go to sleep at 2 in the morning, only to hit the hay at 7 the next evening. ...

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