sleepyti.me bedtime calculator Polyphasic Sleep: 5 Years Later! Chronobiology Polyphasic sleep adaptation myths In my original article I tried to mix science with pop science, as well as with anecdote and humor. Have a peek at the following amazing picture obtained in recent months with the help of SuperMemo. Myth #1 of polyphasic adaptation: a nap is a nap is a nap. Myth #2 of polyphasic adaptation: the circadian cycle can be ignored or abolished, and the sleep can be reduced to one-dimensional homeostatic process. Circadian timing of naps My original "Polyphasic sleep for dummies" section was not very successful in conveying the power of two sleep processes in controlling the timing of sleep. Phase 0: Waking time: napping in Phase 0 is possible, and largely depends on the history of prior sleep (see 0 on the horizontal axis in the graph above). Phase 3: Creativity time: napping in Phase 3 should not ever be possible in a healthy well-regulated system (see 3 on the horizontal axis in the graph above). Phase 8: Siesta: perfect time for napping.
Dr. Christopher Winter: Stop Trying to Get Eight Hours of Sleep You have messages. Inbox (1) Subject: "I told you so!!!" A lone message sat in my inbox last night as I checked my phone before bed. I usually try to avoid email at night, but the subject had me hooked instantly since I'm fairly sure I'm never wrong. I assumed the triple exclamation was meant to send a message of urgency that one or even two exclamation points could not adequately convey. The email was from an unfamiliar sender. Clicking on the link, I was immediately confronted with a picture of Dr. "Once upon a time, you could sleep like a baby. Instantly I knew where this message had come from and what it was about. "Why do you go to bed at 9:00 p.m. if it takes you an hour to fall asleep?" "Because I need my eight hours." Eight hours. Where did this number come from? Sadly, the answer to that question is far from simple. So how much sleep do you need? So how can you figure out how much sleep you need? How long does it take you to fall asleep? Can't sleep? Loading Slideshow
Lucid Dreaming Frequently Asked Questions Answered by The Lucidity Institute Version 2.4 © Lucidity Institute (contact us) This FAQ is a brief introduction to lucid dreaming: what it is, how to do it, and what can be done with it. There are several excellent sources of information on lucid dreaming, the most reliable and extensive of which is the Lucidity Institute website ( Other sources are listed below. "I first heard of lucid dreaming in April of 1982, when I took a course from Dr. 3.4 WHAT TECHNOLOGY IS AVAILABLE TO ASSIST LUCID DREAMING TRAINING? Expérience de sommeil polyphasique How Much Sleep Do You Need View Larger >> Sleep is a vital indicator of overall health and well-being. We spend up to one-third of our lives asleep, and the overall state of our "sleep health" remains an essential question throughout our lifespan. Most of us know that getting a good night’s sleep is important, but too few of us actually make those eight or so hours between the sheets a priority. To further complicate matters, stimulants like coffee and energy drinks, alarm clocks, and external lights—including those from electronic devices—interferes with our "circadian rhythm" or natural sleep/wake cycle. Sleep needs vary across ages and are especially impacted by lifestyle and health. To get the sleep you need, you must look at the big picture. How Much Sleep Do We Really Need: Revisited The National Sleep Foundation released the results of a world-class study that took more than two years of research to complete – an update to our most-cited guidelines on how much sleep you really need at each age.
The biology of dreaming o one would normally consider David Maurice, Ph.D., professor of ocular physiology in the Department of Ophthalmology at Columbia-Presbyterian Medical Center, a revolutionary. Nevertheless, he has reignited a decades-long controversy that could spark a revolutionary re-evaluation of an entire field of behavioral research. Dr. Maurice has developed a startling new line of scientific inquiry that, when added to other findings, could change our understanding of rapid eye movement (REM) sleep and the nature of dreams. What Maurice has done is to suggest an alternative explanation for the phenomenon known as REM sleep, the stage in which the eyes rapidly move and most dreams occur. "Without REM," Maurice told 21stC, "our corneas would starve and suffocate while we are asleep with our eyes closed." Maurice's interest in REM began a few years ago. "What is at stake here is a theory of dreams that is scientifically valid," Dr. Interpretation vs. observation Drs. No final answer in sight Neil B.
Why We Nap: Evolution, Chronobiology, and Functions of Polyphasic and Ultrashort Sleep - Wikipedia, the free encyclopedia Why We Nap: Evolution, Chronobiology, and Functions of Polyphasic and Ultrashort Sleep Why We Nap: Evolution, Chronobiology, and Functions of Polyphasic and Ultrashort Sleep (1992) is a book edited by the Brazilian-Italian-American Claudio Stampi, founder, director and sole proprietor of the Chronobiology Research Institute. It is frequently mentioned by "polyphasic sleepers", as it is one of the few published books about the subject of systematic short napping in extreme situations where consolidated sleep is not possible. According to the book, in a sleep deprived condition, measurements of a polyphasic sleeper's memory retention and analytical ability show increases as compared with monophasic and biphasic sleep (but still a decrease of 12% as compared with free running sleep). According to EEG measurements collected by Dr. ISBN 0-8176-3462-2 published by Birkhäuser, 1992, Boston References[edit] External links[edit]
How Much Sleep Do You Really Need? Sleep is one of the richest topics in science today: why we need it, why it can be hard to get, and how that affects everything from our athletic performance to our income. Daniel Kripke, co-director of research at the Scripps Clinic Sleep Center in La Jolla, Calif., has looked at the most important question of all. In 2002, he compared death rates among more than 1 million American adults who, as part of a study on cancer prevention, reported their average nightly amount of sleep. To many, his results were surprising, but they've since been corroborated by similar studies in Europe and East Asia. Kripke explains. Q: How much sleep is ideal? A: Studies show that people who sleep between 6.5 hr. and 7.5 hr. a night, as they report, live the longest. Morbidity [or sickness] is also "U-shaped" in the sense that both very short sleep and very long sleep are associated with many illnesses—with depression, with obesity—and therefore with heart disease—and so forth.
Freud's *The Interpretation of Dreams* Chapter 1, Section D Back to Psych Web Home Page Back to The Interpretation of Dreams Table of Contents D. Why Dreams Are Forgotten After Waking That a dream fades away in the morning is proverbial. The forgetting of dreams is treated in the most detailed manner by Strumpell. In the first place, all those factors which induce forgetfulness in the waking state determine also the forgetting of dreams. * Periodically recurrent dreams have been observed repeatedly. According to Strumpell, other factors, deriving from the relation of the dream to the waking state, are even more effective in causing us to forget our dreams. Finally, we should remember that the fact that most people take but little interest in their dreams is conducive to the forgetting of dreams. It is therefore all the more remarkable, as Strumpell himself observes, that, in spite of all these reasons for forgetting the dream, so many dreams are retained in the memory. Jessen (p. 547) expresses himself in very decided terms: The observations of V.