Why is the letter 'z' associated with sleep?
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Because of the snoring noise made during sleeping.
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Title: A manual of standardized terminology, techniques and scoring system for sleep stages of human subjects.\nAllan Rechtschaffen and Anthony Kales, editors. \nAuthor(s): Kales, Anthony. ; Rechtschaffen, Allan.  \nCorp Author(s): University of California, Los Angeles.; Brain Information Service. ; NINDB Neurological Information Network.  \nPublication: Bethesda, Md., U.S. National Institute of Neurological Diseases and Blindness, Neurological Information Network, \nYear: 1968 and 1973\n\nMost college or university libraries have this.\n\nYou can also ask any local library to use their WORLDCAT database to track down a copy for you to borrow.\n\nBest wishes.
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according to psychoanalytic theory, our refulated uncounscious desires and drives(usually sexual and aggressive ones)penetrate through dreams, a reason why part of the psychanalytic therapy relies on dream interpretation, trying to link the latent content to the manifest one.\nas far as my knowledge reaches, i think nowadays, knowing the fact that during the rem sleep our cerebral activity is similar to the one in the waking state, dreams are more likely to be images and situations which have troubled us during the day (or the past days) and which are somehow reintegrated into an entirely free "imaginary space" which lacks the boundaries of a syntax, as language does.
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It is an instinctual social response.  Yawning signals to others in the social group that it is time to rest.
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you may sleep with your mouth open or snore and that can cause it. Sometimes when i drink soda before bed, I get thirsty during the night-that might be it.
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first of all, zoos has an s.  not a z.  adding z only makes it look like you cant type.\n\nsecond, click the link
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I just finished my 2nd semester of law school, and I am also sleeping in that much since last week. I assume that it is our body telling us that it is catching up on the sleep that we deprived it of for so many months. There has been research done on that; they refer to it as a sleep bank. So, as long as you are not emotionally unstable, there is nothing wrong with relaxing your body and busy mind with sleep. As you know, once school kicks in again, we will be sleep deprived again. Enjoy! :o)
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SLEEP TALKING\nSleep talking (somniloquy) refers to any utterance made during sleep, from one word to entire sentences. It can be brought on by stress or some illness. It is relatively harmless although disturbing to room mates. \n\nSYMPTOMS:\nSpeaking or muttering during sleep \nSleeper is not aware he is talking \nSometimes shouting, singing or moaning \nMay be associated with other sleep disorders \nMay be associated with physical or mental illness \n\nTREATMENT\nAvoid or eliminate stress. \nTry relaxation techniques or meditation. \nHave someone awaken you \n\n\n\n\nSLEEP WALKING\nSleep walking (somnambulism) refers to everything from sitting up in bed to getting up and performing detailed tasks. The sleeper does these things as though in a trance. It's relatively harmless provided the walker is protected from harmful situations like upper story windows, bunk beds and stairs.\n\nSYMPTOMS:\n\nRising from the bed during sleep \nBlank face. Stares into space \nUnresponsive when spoken to \nDifficult to awaken \nNo recall of the incident \nMay consist of sitting up making walking motions, actually walking, or even performing detailed tasks. \n\nTREATMENT\nAgain, as in nightmares, sleep talking, etc., stress can be a big factor. \nTry relaxation techniques or meditation prior to bed time. \nAvoid becoming over tired or fatigued. \nSome drugs can cause episodes of sleep walking. \nAvoid the use of alcohol. \nIf you sleep with someone, have them awaken you if you become restless. \nIf you sleep walk, make sure your surroundings are safe and obstacle free. Avoid sleeping upstairs or in an upper bunk\n\n\n\n\nNightmares\nIt's important to distinguish between nightmares and night terrors. The two occur during different stages of sleep. Night terrors occur during NREM sleep, cause screaming and thrashing about and are rarely remembered in detail.\nNightmares occur in REM sleep. They cause fear but rarely the screaming and other symptoms associated with night terrors. Nightmares can be remembered as well or badly as any other dream.\n\n\nJust Bad Dreams?\nA nightmare is in effect "just" a bad dream, albeit a very intense one. However nightmares can be extremely distressing and should not be discounted.\nDuring a nightmare the pulse may increase and the body sweat - physiological responses to a very real feeling of fear. Nightmares usually result in the sleeper waking with a feeling of fear or anxiety however this soon passes.\n\nIt's wrong to say "only children have nightmares". Certainly children seem to have more nightmares, however most adults still have them on occasion. One difference seems to be that adults are better at ignoring their nightmares. By next morning adults often forget that they had a nightmare - or at least manage to suppress the memory.\n\n\nWhat Causes Nightmares?\nThere's no single cause of nightmares. Sometimes physical factors can be involved, such as illness and/or medication. Sometimes a nightmare reflects some unusual stress or trauma in the waking world. Sometimes it is just a result of small, niggling worries that have been ignored for too long.\nNightmares rarely cause any direct physical harm beyond interrupted sleep. However they can still have an indirect impact. Even if you put the nightmare aside as "just a bad dream", you can find yourself going through the next day feeling unusually irritable, moody or depressed. An unresolved nightmare can lead to a bad day.\n\nOne suggestion is to try to "neutralise" the nightmare before going back to sleep. Lie back and visualise a positive, peaceful and happy alternative to the nightmare. If you were being chased, perhaps you turn and face the pursuer, only to discover it's a cuddly teddy bear just having fun. If you were falling, perhaps you float gently down onto a thick feather mattress covered with silk sheets. Even if you can't think of a specific alternative to the dream, be sure to conjure
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In England, the letter 'S' is pronounced like a 'Z' with far more frequency than in America.  Take the word 'eraser', for example.  But there isn't a specific rule, it depends on the word.
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Sleep Walking is an arousal disorder.  I am not sure but I think the cause \nis still quite unknown.  In children, it could be related to fatigue, \nanxiety and prior sleep loss.  In adults it's more likely to be related to \nreaction to medications or it could be a symptom of a mental disorder.
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all i know is that it has to do with the thoughts you have while your sleeping. hopefully someone else can give you a better answer. good luck! i'm just as curious.
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There are tons, especially if you take the differences between British and American spelling into account.\n\nHonor v honour, vigor v vigour, etc.\nThey also use "z" less frequently than we do, using "s" instead.  Sympathize v sympathise or colorize v colourise.
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Although talking and sleep walking have both been known for centuries, little is known about these conditions.  Sleep studies have shown that both appear to happen during stage 3 NREM sleep.\nNo cause is currently known.
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Our body uses sleep for extreme brain activity.  It goes through all of the happenings of the day and records and categorizes them.  It decides the lessons learned (as in, if you got bit by a large green bug..you will now avoid large green bugs) and helps maintain the learning process.\n\nWithout adequet sleep, you will often not remember the events of the last few days as well, and being that you did not have time to process the last events, you will have difficulty concentrating on new ones.\n\n\nThat and its fun.
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From A to Z you say?  Okay let me figure this out....after analyzing the alphabet....I'm somewhere between S and T. Now that I see it in print ...I see some missing letters that form a word we say often when we are angry...lol lol lol.....I'm retired....and enjoying yahoo answers....addicted you might say.....thanks for this fun question...
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ZZZZZZZZZZzzzzzzzzzzzz!!!\n\nsnore! \n\ngrunt...grumple....UH!! What...Hey, who turned on the light? \n\nI'm trying to sleep, in here!! \n\nWell, how would you like it, if someone turned on the light while you were sleeping. So why shuold the anikmals feeel any different. ...
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Sleep deprivation is a common condition that afflicts 47 million American adults, or almost a quarter of the adult population. Symptoms can interfere with memory, energy levels, mental abilities, and emotional mood. A study conducted by the University of Chicago Medical Center in 1999 indicates that the condition drastically affects the body's ability to metabolize glucose, leading to symptoms that mimic early-stage diabetes.\n\nSo why do we sleep? This is a question that has baffled scientists for centuries and the answer is, no one is really sure. Some believe that sleep gives the body a chance to recuperate from the day's activities but in reality, the amount of energy saved by sleeping for even eight hours is miniscule - about 50 kCal, the same amount of energy in a piece of toast.\n\nWe have to sleep because it is essential to maintaining normal levels of cognitive skills such as speech, memory, innovative and flexible thinking. In other words, sleep plays a significant role in brain development.  The brain's frontal cortex relies on sleep to function effectively. Again, insufficient rest adversely affects the frontal cortex's ability to control speech, access memory, and solve problems. The effect on physical energy is also startling: otherwise healthy people quickly show symptoms of age and early diabetes as glucose metabolism falls by up to forty percent. These physical reactions disappear when the test subject is allowed to rest properly. \n\nExhaustion, fatigue and lack of physical energy are common sleep deprivation symptoms. Exhaustion and fatigue affect our emotional moods, causing pessimism, sadness, stress and anger. The National Sleep Foundation (NSF) has suggested that social problems such as road rage may be caused, in part, by a national epidemic of sleepiness.