ALPHABETICAL BRAIN™ VOCABULARY
OF SECULAR SCIENCE STARS
December 12, 2020
WHY WE SLEEP:
Unlocking the Power of Sleep and Dreams
by Matthew P. Walker.
Scribner, 2017 (i-viii, 360 pages)
note = Numbers in parentheses refer to pages
Quote = "Sleep is one of the most important but least understood aspects of our life, wellness, and longevity...Within the brain, sleep enriches our ability to learn, memorize, and make logical decisions. It recalibrates our emotions, restocks our immune system, fine-tunes our metabolism, and regulates our appetite. Dreaming mollifies painful memories and creates a virtual reality space in which the brain melds past and present knowledge to inspire creativity." (from publisher's blurb)
PART 1 --- THIS THING CALLED SLEEP (1-104)
1) TO SLEEP (3-12)
2) CAFFEINE, JET LAG, AND MELATONIN Losing and Gaining Control of Your Sleep Rhythm (13-37)
3) DEFINING AND GENERATING SLEEP Time Dilation and What We Learned from a Baby in 1952 (38-55)
4) APE BEDS, DINOSAURS, AND NAPPING WITH HALF A BRAIN Who Sleeps, How Do We Sleep, and How Much? (56-77)
5) CHANGES IN SLEEP ACROSS THE LIFE SPAN (78-104)
PART 2 --- WHY SHOULD YOU SLEEP? (105-189)
6) YOUR MOTHER AND SHAKESPEARE KNEW The Benefits of Sleep for the Brain (107-132)
7) TOO EXTREME FOR THE GUINNESS BOOK OF WORLD RECORDS Sleep Deprivation and the Brain (133-163)
8) CANCER, HEART ATTACKS, AND A SHORTER LIFE Sleep Deprivation and the Body (164-189)
PART 3 --- HOW AND WHY WE DREAM (191-234)
9) ROUTINELY PSYCHOTIC REM-Sleep Dreaming (193-205)
10) DREAMING AS OVERNIGHT THERAPY (206-218)
11) DREAM CREATIVITY AND DREAM CONTROL (219-234)
PART 4 FROM SLEEPING PILLS TO SOCIETY TRANSFORMED (235-339)
12) THINGS THAT GO BUMP IN THE NIGHT Sleep Disorders and Death Caused by No Sleep (237-264)
13) IPADS, FACTORY WHISTLES, AND NIGHTCAPS What's Stopping You from Sleeping? (265-281)
14) HURTING AND HELPING YOUR SLEEP Pills vs. Therapy (282-295)
15) SLEEP AND SOCIETY What Medicine and Education Are Doing Wrong; What Google and NASA Are Doing Right (296-323)
16) A NEW VISION FOR SLEEP IN THE 21st CENTURY (324-339)
CONCLUSION To Sleep or Not to Sleep (340)
note = "Within the space of a mere hundred years, human beings have abandoned their biologically mandated need for adequate sleep one that evolution spent 3,400,000 years perfecting in service of life-support functions. As a result, the decimation of sleep throughout industrialized nations is having a catastrophic impact on our health, our life expectancy, our safety, our productivity, and the education of our children." (340)
APPENDIX TWELVE TIPS FOR HEALTHY SLEEP (341-342)
note = "This silent sleep loss epidemic is the greatest public health challenge we face in the 21st century in developed nations. If we wish to avoid the suffocating noose of sleep neglect, the premature death it inflicts, and the sickening health it invites, a radical shift in our personal, cultural, professional, and societal appreciation of sleep must occur." (340)
note = "I believe it is time for us to reclaim our right to a full night of sleep, without embarrassment or the damaging stigma of laziness. In doing so, we can be reunited with that most powerful elixir of wellness and vitality, dispensed through every conceivable biological pathway. Then we may remember what it feels like to be truly awake during the day, infused with the very deepest plenitude of being." (340)
1 - "Stick to a sleep schedule. Go to bed and wake up at the same time each day. As creatures of habit, people have a hard time adjusting to changes in sleep patterns. Sleeping later on weekends will not fully make up for a lack of sleep during the week and will make it harder to wake up early on Monday morning. Set an alarm for bedtime. Often we set an alarm for when it is time to wake up but fail to do so for when it is time to go to sleep. If there is only one piece of advice you remember and take from these twelve tips, this should be it."
ILLUSTRATION PERMISSIONS (343)
2 - "Exercise is great, but not too late in the day. Try to exercise at least thirty minutes on most days but not later than two to three hours before your bedtime."
3 - "Avoid caffeine and nicotine. Coffee, colas, certain teas, and chocolate contain the stimulant caffeine, and its effects can take as long as eight hours to wear off fully. Therefore, a cup of coffee in the late afternoon can make it hard for you to fall asleep at night. Nicotine is also a stimulant, often causing smokers to sleep only very lightly. In addition, smokers often wake up too early in the morning because of nicotine withdrawal."
4 - "Avoid alcoholic drinks before bed. Having a nightcap or alcoholic beverage before sleep may help you relax, but heavy use robs you of REM sleep, keeping you in the lighter stages of sleep. Heavy alcohol ingestion also may contribute to impairment in breathing at night. You also tend to wake up in the middle of the night when the effects of the alcohol have worn off."
5 - "Avoid large meals and beverages late at night. A light snack is okay, but a large meal can cause indigestion, which interferes with sleep. Drinking too many fluids at night can cause frequent awakenings to urinate."
6 - "If possible, avoid medicines that delay or disrupt your sleep. Some commonly prescibed heart, blood pressure, or asthma medications, as well as some over-the-counter and herbal remedies for coughs, colds, or allergies, can disrupt sleep patterns. If you have trouble sleeping, talk to your health care provider or pharmacist to see whether any drugs you are taking might be contributing to your insomnia and ask whether they can be taken at other times during the day or early in the evening."
7 - "Dont take naps after 3 p.m. Naps can help make up for lost sleep, but late afternoon naps can make it harder to fall asleep at night."
8 - "Relax before bed. Do not overschedule your day so that no time is left for unwinding. A relaxing activity, such as reading or listening to music, should be part of your bedtime ritual."
9 - "Take a hot bath before bed. The drop in body temperature after getting out of the bath may help you feel sleepy, and the bath can help you relax and slow down so you are more ready to sleep."
10 - "Dark bedroom, cool bedroom, gadget-free bedroom. Get rid of anything in your bedroom that might distract you from sleep, such as noises, bright lights, an uncomfortable bed, or warm temperatures. You sleep better if the temperature in the room is kept on the cool side. A TV, cell phone, or computer in the bedroom can be a distraction and deprive you of needed sleep. Having a comfortable mattress and pillow can help promote a good night's sleep. Individuals who have insomnia often watch the clock. Turn the clocks face out of view so you don't worry about the time while trying to fall asleep."
11 - "Have the right sunlight exposure. Daylight is key to regulating daily sleep patterns. Try to get outside in natural sunlight for at least thirty minutes each day. lf possible, wake up with the sun or use very bright lights in the morning. Sleep experts recommend that, if you have problems falling asleep, you should get an hour of exposure to morning sunlight and turn down the lights before bedtime."
12 - "Do not lie in bed awake. if you find yourself still awake after staying in bed for more than twenty minutes or if you are starting to feel anxious or worried, get up and do some relaxing activity until you feel sleepy. The anxiety of not being able to sleep can make it harder to fall asleep." (341-342)
+ Reprinted from NIH Medline Plus (Internet). Bethesda, MD: National Library of Medicine (US); summer 2012. Tips for Getting a Good Night's Sleep. Available from
AUTHOR NOTE, SUMMARY,
AND BOOK DESCRIPTION
SUMMARY = The first sleep book by a leading scientific expert Professor Matthew Walker, Director of UC Berkeley's Sleep and Neuroimaging Lab reveals his groundbreaking exploration of sleep, explaining how we can harness its transformative power to change our lives for the better...[by giving us] a new understanding of the vital importance of sleep and dreaming.
BOOK DESCRIPTION = Until very recently, science had no answer to the question of why we sleep, or what good it served, or why we suffer such devastating health consequences when we don't sleep. Compared to the other basic drives in life eating, drinking, and reproducing the purpose of sleep remained elusive...[However,] an explosion of scientific discoveries in the last 20 years has shed new light on this fundamental aspect of our lives.
Walker answers important questions about sleep: how do caffeine and alcohol affect sleep? What really happens during REM sleep? Why do our sleep patterns change across a lifetime? How do common sleep aids affect us and can they do long-term damage?
Charting cutting-edge scientific breakthroughs, and synthesizing decades of research and clinical practice, Walker explains how we can harness sleep to improve learning, mood, and energy levels; regulate hormones; prevent cancer, Alzheimer's, and diabetes; slow the effects of aging; increase longevity; enhance the education and lifespan of our children, and boost the efficiency, success, and productivity of our businesses. Clear-eyed, fascinating, and accessible, this book is crucial and illuminating.
EDITORIAL BOOK REVIEWS
LIBRARY JOURNAL REVIEW = Why do we sleep? Walker (neuroscience & psychology, Univ. of California Berkeley) draws from 20 years of sleep research, which demonstrates that sleep provides a plethora of benefits, both mental and physical, to the entire body. He discusses the biology of sleep, the dangers of sleep deprivation, why we dream, and sleep disorders. The author laments the organizational culture that equates sleeplessness with productivity, and demonstrates the fallacy of that belief.
He emphasizes the importance of sleep to the developing brains of children and teenagers, and why early school start times are harming high school students physically and academically. He also explains that if all of the benefits that sleep bestows could be formatted into a pill, no one would hesitate to take it; but the benefits are available to all of us for free. The book closes with a discussion of personal, organizational, and societal practices that would greatly benefit health, productivity, creativity, and longevity. Walker is a scientist but writes for the layperson, illustrating tricky concepts with easily grasped analogies. - VERDICT Of particular interest to business owners, educators, parents, and government officials, and anyone who has ever suffered from a poor night's sleep. Rachel Owens, -Daytona State Coll. Lib., FL
PUBLISHERS WEEKLY REVIEW = Walker, a professor of neuroscience and psychology at UC Berkeley, begins his first book by reminding readers that until quite recently, the routine that most of us go through nightly was a mystery. Adopting a conversational style that belies his research background, Walker conveys his insights into the process of sleep with enthralling clarity. He recounts how once, after giving a lecture, he was approached by a pianist, who made the seemingly incidental remark that, after a good night's sleep he can "just play" even demanding pieces, leading Walker to recognize how closely related learning is to rest. He also sheds new light on well-covered areas, revealing that Freud had developed a more biologically founded approach to dreams before formulating his famous theory. The biggest takeaway is not that lack of sleep can literally kill, but that most of us, without being in mortal danger, are still not getting nearly enough. Anyone who reads this book will (though perhaps only after a good night's sleep) learn a great deal about one of life's most basic, but also most profound, needs. Agent: Tina Bennett, William Morris Endeavor.
WHY WE SLEEP --- TO SLEEP
Do you think you got enough sleep this past week? Can you recall the last time you woke up without an alarm clock feeling refreshed, not needing caffeine? If the answer to either of these questions is "no," you are not alone. Two-thirds of adults throughout all developed nations fail to obtain the recommended eight hours of nightly sleep. (I)
I doubt you are surprised by this fact, but you may be surprised by the consequences. Routinely sleeping less than six or seven hours a night demolishes your immune system, more than doubling your risk of cancer. Insufficient sleep is a key lifestyle factor determining whether or not you will develop Alzheimer's disease. Inadequate sleep even moderate reductions for just one week disrupts blood sugar levels so profoundly that you would be classified as pre-diabetic. Short sleeping increases the likelihood of your coronary arteries becoming blocked and brittle, setting you on a path toward cardiovascular disease, stroke, and congestive heart failure. Fitting Charlotte Brontλ's prophetic wisdom that "a ruffled mind makes a restless pillow," sleep disruption further contributes to all major psychiatric conditions, including depression, anxiety, and suicidality.
Perhaps you have also noticed a desire to eat more when you're tired? This is no coincidence. Too little sleep swells concentrations of a hormone that makes you feel hungry while suppressing a companion hormone that otherwise signals food satisfaction. Despite being full, you still want to eat more. It is a proven recipe for weight gain in sleep-deficient adults and children alike. Worse, should you attempt to diet but don't get enough sleep while doing so, it is futile, since most of the weight you lose will come from lean body mass, not fat.
Add the above health consequences up, and a proven link becomes easier to accept: the shorter your sleep, the shorter your life span. The old maxim "I'll sleep when I'm dead" is therefore unfortunate. Adopt this mind-set, and you will be dead sooner and the quality of that (shorter) life will be worse. The elastic band of sleep deprivation can stretch only so far before it snaps. Sadly, human beings are in fact the only species that will deliberately deprive themselves of sleep without legitimate gain. Every component of wellness, and countless seams of societal fabric, are being eroded by our costly state of sleep neglect: human and financial alike. So much so that the World Health Organization (WHO) has now declared a sleep loss epidemic throughout industrialized nations.(II) It is no coincidence that countries where sleep time has declined most dramatically over the past century, such as the US, the UK, Japan, and South Korea, and several in western Europe, are also those suffering the greatest increase in rates of the aforementioned physical diseases and mental disorders.
Scientists such as myself have even started lobbying doctors to start "prescribing" sleep. As medical advice goes, it's perhaps the most painless and enjoyable to follow. Do not, however, mistake this as a plea to doctors to start prescribing more sleeping pills --- quite the opposite, in fact, considering the alarming evidence surrounding the deleterious health consequences of these drugs.
But can we go so far as to say that a lack of sleep can kill you outright? Actually, yes --- on at least two counts. First, there is a very rare genetic disorder that starts with a progressive insomnia, emerging in midlife. Several months into the disease course, the patient stops sleeping altogether. By this stage, they have started to lose many basic brain and body functions. No drugs that we currently have will help the patient sleep. After twelve to eighteen months of no sleep, the patient will die. Though exceedingly rare, this disorder asserts that a lack of sleep can kill a human being.
Second is the deadly circumstance of getting behind the wheel of a motor vehicle without having had sufficient sleep. Drowsy driving is the cause of hundreds of thousands of traffic accidents and fatalities each year. And here, it is not only the life of the sleep-deprived individuals that is at risk, but the lives of those around them. Tragically, one person dies in a traffic accident every hour in the United States due to a fatigue-related error. It is disquieting to learn that vehicular accidents caused by drowsy driving exceed those caused by alcohol and drugs combined.
Society's apathy toward sleep has, in part, been caused by the historic failure of science to explain why we need it. Sleep remained one of the last great biological mysteries. All of the mighty problem-solving methods in science genetics, molecular biology, and high-powered digital technology have been unable to unlock the stubborn vault of sleep. Minds of the most stringent kind, including Nobel Prize-winner Francis Crick, who deduced the twisted-ladder structure of DNA, famed Roman educator and rhetorician Quintilian, and even Sigmund Freud had all tried their hand at deciphering sleep's enigmatic code, all in vain.
To better frame this state of prior scientific ignorance, imagine the birth of your first child. At the hospital, the doctor enters the room and says, "Congratulations, it's a healthy baby boy. We've completed all of the preliminary tests and everything looks good." She smiles reassuringly and starts walking toward the door. However, before exiting the room she turns around and says, "There is just one thing. From this moment forth, and for the rest of your child's entire life, he will repeatedly and routinely lapse into a state of apparent coma. It might even resemble death at times. And while his body lies still his mind will often be filled with stunning, bizarre hallucinations. This state will consume one-third of his life and I have absolutely no idea why he'll do it, or what it is for. Good luck!"
Astonishing, but until very recently, this was reality: doctors and scientists could not give you a consistent or complete answer as to why we sleep. Consider that we have known the functions of the three other basic drives in life --- to eat, to drink, and to reproduce --- for many tens if not hundreds of years now. Yet the fourth main biological drive, common across the entire animal kingdom --- the drive to sleep --- has continued to elude science for millennia.
Addressing the question of why we sleep from an evolutionary perspective only compounds the mystery. No matter what vantage point you take, sleep would appear to be the most foolish of biological phenomena. When you are asleep, you cannot gather food. You cannot socialize. You cannot find a mate and reproduce. You cannot nurture or protect your offspring. Worse still, sleep leaves you vulnerable to predation. Sleep is surely one of the most puzzling of all human behaviors.
On any one of these grounds never mind all of them in combination there ought to have been a strong evolutionary pressure to prevent the emergence of sleep or anything remotely like it. As one sleep scientist has said, "If sleep does not serve an absolutely vital function, then it is the biggest mistake the evolutionary process has ever made." (III)
Yet sleep has persisted. Heroically so. Indeed, every species studied to date sleeps. (IV) This simple fact establishes that sleep evolved with --- or very soon after --- life itself on our planet. Moreover, the subsequent perseverance of sleep throughout evolution means there must be tremendous benefits that far outweigh all of the obvious hazards and detriments.
Ultimately, asking "Why do we sleep?" was the wrong question. It implied there was a single function, one holy grail of a reason that we slept, and we went in search of it. Theories ranged from the logical (a time for conserving energy), to the peculiar (an opportunity for eyeball oxygenation), to the psychoanalytic (a non-conscious state in which we fulfill repressed wishes).
This book will reveal a very different truth: sleep is infinitely more complex, profoundly more interesting, and alarmingly more health-relevant. We sleep for a rich litany of functions, plural an abundant constellation of nighttime benefits that service both our brains and our bodies. There does not seem to be one major organ within the body, or process within the brain, that isn't optimally enhanced by sleep (and detrimentally impaired when we don't get enough). That we receive such a bounty of health benefits each night should not be surprising. After all, we are awake for two-thirds of our lives, and we don't just achieve one useful thing during that stretch of time. We accomplish myriad undertakings that promote our own well-being and survival. Why, then, would we expect sleep --- and the twenty-five to thirty years, on average, it takes from our lives --- to offer one function only?
Through an explosion of discoveries over the past twenty years, we have come to realize that evolution did not make a spectacular blunder in conceiving of sleep. Sleep dispenses a multitude of health-ensuring benefits, yours to pick up in repeat prescription every twenty-four hours, should you choose. (Many don't.)
Within the brain, sleep enriches a diversity of functions, including our ability to learn, memorize, and make logical decisions and choices. Benevolently servicing our psychological health, sleep recalibrates our emotional brain circuits, allowing us to navigate next-day social and psychological challenges with cool-headed composure.
We are even beginning to understand the most impervious and controversial of all conscious experiences: the dream. Dreaming provides a unique suite of benefits to all species fortunate enough to experience it, humans included. Among these gifts are a consoling neurochemical bath that mollifies painful memories and a virtual reality space in which the brain melds past and present knowledge, inspiring creativity.
Downstairs in the body, sleep restocks the armory of our immune system, helping fight malignancy, preventing infection, and warding off all manner of sickness. Sleep reforms the body's metabolic state by fine-tuning the balance of insulin and circulating glucose. Sleep further regulates our appetite, helping control body weight through healthy food selection rather than rash impulsivity. Plentiful sleep maintains a flourishing microbiome within your gut from which we know so much of our nutritional health begins. Adequate sleep is intimately tied to the fitness of our cardiovascular system, lowering blood pressure while keeping our hearts in fine condition.
A balanced diet and exercise are of vital importance, yes. But we now see sleep as the preeminent force in this health trinity. The physical and mental impairments caused by one night of bad sleep dwarf those caused by an equivalent absence of food or exercise. It is difficult to imagine any other state natural or medically manipulated --- that affords a more powerful redressing of physical and mental health at every level of analysis.
Based on a rich, new scientific understanding of sleep, we no longer have to ask what sleep is good for. Instead, we are now forced to wonder whether there are any biological functions that do not benefit by a good night's sleep. So far, the results of thousands of studies insist that no, there aren't.
Emerging from this research renaissance is an unequivocal message: sleep is the single most effective thing we can do to reset our brain and body health each day Mother Nature's best effort yet at contra-death. Unfortunately, the real evidence that makes clear all of the dangers that befall individuals and societies when sleep becomes short have not been clearly telegraphed to the public. It is the most glaring omission in the contemporary health conversation. In response, this book is intended to serve as a scientifically accurate intervention addressing this unmet need, and what I hope is a fascinating journey of discoveries. It aims to revise our cultural appreciation of sleep, and reverse our neglect of it.
Personally, I should note that I am in love with sleep (not just my own, though I do give myself a non-negotiable eight-hour sleep opportunity each night). I am in love with everything sleep is and does.
I am in love with discovering all that remains unknown about it. I am in love with communicating the astonishing brilliance of it to the public. I am in love with finding any and all methods for reuniting humanity with the sleep it so desperately needs. This love affair has now spanned a twenty-plus-year research career that began when I was a professor of psychiatry at Harvard Medical School and continues now that I am a professor of neuroscience and psychology at the University of California, Berkeley.
It was not, however, love at first sight. I am an accidental sleep researcher. It was never my intent to inhabit this esoteric outer territory of science. At age eighteen I went to study at the Queen's Medical Center in England: a prodigious institute in Nottingham boasting a wonderful band of brain scientists on its faculty. Ultimately, medicine was not for me, as it seemed more concerned with answers, whereas I was always more enthralled by questions. For me, answers were simply a way to get to the next question. I decided to study neuroscience, and after graduating, obtained my PhD in neurophysiology supported by a fellowship from England's Medical Research Council, London.
It was during my PhD work that I began making my first real scientific contributions in the field of sleep research. I was examining patterns of electrical brainwave activity in older adults in the early stages of dementia. Counter to common belief, there is not just one type of dementia. Alzheimer's disease is the most common, but is only one of many types. For a number of treatment reasons, it is critical to know as soon as possible which type of dementia an individual is suffering from.
I began assessing brainwave activity from my patients during wake and sleep. My hypothesis: there was a unique and specific electrical brain signature that could forecast which dementia subtype each individual was progressing toward. Measurements taken during the day were ambiguous, with no clear signature of difference to be found. Only in the nighttime ocean of sleeping brainwaves did the recordings speak out a clear labeling of my patients saddening disease fate. The discovery proved that sleep could potentially be used as a new early diagnostic litmus test to understand which type of dementia an individual would develop.
Sleep became my obsession. The answer it had provided me, like all good answers, only led to more fascinating questions, among them: Was the disruption of sleep in my patients actually contributing to the diseases they were suffering from, and even causing some of their terrible symptoms, such as memory loss, aggression, hallucinations, delusions? I read all I could. A scarcely believable truth began to emerge --- nobody actually knew the clear reason why we needed sleep, and what it does. I could not answer my own question about dementia if this fundamental first question remained unanswered. I decided I would try to crack the code of sleep.
I halted my research in dementia and, for a post-doctoral position that took me across the Atlantic Ocean to Harvard, set about addressing one of the most enigmatic puzzles of humanity one that had eluded some of the best scientists in history: Why do we sleep? With genuine naοvetι, not hubris, I believed I would find the answer within two years. That was twenty years ago. Hard problems care little about what motivates their interrogators; they meter out their lessons of difficulty all the same.
Now, after two decades of my own research efforts, combined with thousands of studies from other laboratories around the world, we have many of the answers. These discoveries have taken me on wonderful, privileged, and unexpected journeys inside and outside of academia--from being a sleep consultant for the NBA, NFL, and British Premier League football teams; to Pixar Animation, government agencies, and well-known technology and financial companies; to taking part in and helping make several mainstream television programs and documentaries. These sleep revelations, together with many similar discoveries from my fellow sleep scientists, will offer all the proof you need about the vital importance of sleep.
A final comment on the structure of this book. The chapters are written in a logical order, traversing a narrative arc in four main parts.
PART 1 Demystifies this beguiling thing called sleep: what it is, what it isn't, who sleeps, how much they sleep, how human beings should sleep (but are not), and how sleep changes across your life span or that of your child, for better and for worse.
PART 2 Details the good, the bad, and the deathly of sleep and sleep loss. We will explore all of the astonishing benefits of sleep for brain and for body, affirming what a remarkable Swiss Army knife of health and wellness sleep truly is. Then we turn to how and why a lack of sufficient sleep leads to a quagmire of ill health, disease, and untimely death a wake-up call to sleep if ever there was one.
PART 3 Offers safe passage from sleep to the fantastical world of dreams scientifically explained. From peering into the brains of dreaming individuals, and precisely how dreams inspire Nobel Prize-winning ideas that transform the world, to whether or not dream control really is possible, and if such a thing is even wise all will be revealed.
PART 4 Seats us first at the bedside, explaining numerous sleep disorders, including insomnia. I will unpack the obvious and not-so-obvious reasons for why so many of us find it difficult to get a good night's sleep, night after night. A frank discussion of sleeping pills then follows, based on scientific and clinical data rather than hearsay or branding messages. Details of new, safer, and more effective non-drug therapies for better sleep will then be advised. Transitioning from bedside up to the level of sleep in society, we will subsequently learn of the sobering impact that insufficient sleep has in education, in medicine and health care, and in business.
The evidence shatters beliefs about the usefulness of long waking hours with little sleep in effectively, safely, profitably, and ethically accomplishing the goals of each of these disciplines. Concluding the book with genuine optimistic hope, I lay out a road map of ideas that can reconnect humanity with the sleep it remains so bereft of --- a new vision for sleep in the twenty-first century.
I should point out that you need not read this book in this progressive, four-part narrative arc. Each can, for the most part, be read individually, and out of order, without losing too much of its significance. I therefore invite you to consume the book in whole or in part, buffet-style or in order, all according to your personal taste.
In closing, I offer a disclaimer. Should you feel drowsy and fall asleep while reading the book, unlike most authors, I will not be disheartened. Indeed, based on the topic and content of this book, I am actively going to encourage that kind of behavior from you. Knowing what I know about the relationship between sleep and memory, it is the greatest form of flattery for me to know that you, the reader, cannot resist the urge to strengthen and thus remember what I am telling you by falling asleep. So please, feel free to ebb and flow into and out of consciousness during this entire book. I will take absolutely no offense. On the contrary, I would be delighted.
(I) - The World Health Organization and the National Sleep Foundation both stipulate an average of eight hours of sleep per night for adults.
(II) - Sleepless in America, National Geographic, Http://channel.nationalgeographic.com/sleepless-in-america/episode/sleepless-in-america.
III) - Dr. Allan Rechtschaffen.
IV - Kushida, C. Encyclopedia of Sleep, Volume 1 (Elsever, 2013).
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