You typically go through multiple sleep cycles a night. Most dreaming occurs during this stage of sleep. Your eyes quickly move back and forth during REM sleep. This sleep stage is called rapid eye movement (REM) sleep. This is recorded during a sleep study with a test called an electroencephalogram (EEG).Īfter an hour or two of NREM sleep, brain activity picks up again. During this stage, brain waves slow down. The typical process of falling asleep begins with a sleep stage called non-rapid eye movement (NREM) sleep. It can identify if or when your sleep patterns are disrupted and why. And whether future productions - especially those that take only digital form - will be more or less persistent than their predecessors remains to be seen.Polysomnography monitors your sleep stages and cycles. Many things of value have indeed been lost “on the march” and cannot be recovered or re-produced. Noble, yes, but of course completely untrue - except for the good advice to count our stock. You do not suppose, my lady, that if all Archimedes had been hiding in the great library of Alexandria, we would be at a loss for corkscrew? Mathematical discoveries glimpsed and lost to view will have their time again. Ancient cures for diseases will reveal themselves once more. The missing plays of Sophocles will turn up piece by piece, or be written again in another language. But there is nothing outside the march so nothing can be lost to it. The procession is very long and life is very short. We shed as we pick up, like travelers who must carry everything in their arms, and what we let fall will be picked up by those behind. Seven plays from Aeschylus, seven from Sophocles, and nineteen from Euripedes, my lady! You should no more grieve for the rest than for a buckle lost from your first shoe, or for your lesson book which will be lost when you are old. Her tutor Septimus Hodge gives a noble answer:īy counting our stock. Oh, Septimus! - can you bear it? All the lost plays of the Athenians! Two hundred at least by Aeschylus, Sophocles, Euripides - thousands of poems - Artistotle’s own library brought to Egypt by the noodle’s ancestors! How can we sleep for grief? The Codex Sinaiticus - are you kidding me? The only manuscript of Beowulf? And of Sir Gawain and the Green Knight and the other works of that magnificent unknown poet?But then I think: what is missing? What has been lost? How do we know that there aren’t poems still greater than Beowulf and Sir Gawain that didn’t make it? Thus Thomasina Coverly’s outcry in Tom Stoppard’s much-praised - and rightly so - Arcadia: My first thought is, invariably: what a miracle that these things survived. I always visit that room when I’m in London, and I never cease to marvel at what it holds. There are different ways to be productive, and one of them involves sheer thinking - and in the past week I had many opportunities to think, many provocations of thought.For instance: I couldn’t help meditating on our recent discussion of fragility as I was visiting the great manuscript room of the British Library. I was not able to do what I went to London primarily to do - let me just say that the Jesuit Archive in London is a stern and jealous guardian of the documents in its care - but I had a productive time anyway.
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