#Sleeping dogs lie meaning series

Infants usually require 16 to 20 hours of total sleep during a 24-hour period, and the amount decreases as the child matures. Sleep requirements vary greatly among individuals. This is probably because of increased autonomic activity, irregular pulse, and fluctuations in blood pressure, which are all typical of REM sleep.Д«enefits of Sleep. Convulsions, myocardial infarction, and cardiac arrhythmias are more likely to occur during REM sleep. In addition to the rapid eye movements that can be observed through closed eyelids, REM sleep can be recognized by complete relaxation of the lower jaw. While everyone dreams every night, many do not remember dreaming most people are aware, however, that they dream more just before rising. With each cycle, NREM sleep decreases and REM sleep increases so that by the end of the night most of the sleep is REM sleep, which is when dreams occur. Brief cycles of about 10 to 30 minutes of REM sleep recur throughout the night, alternating with various stages of NREM sleep.

#Sleeping dogs lie meaning series

Within 90 minutes after sleep begins, an adult progresses through all four stages of NREM sleep and then proceeds into the first of a series of REM periods of sleep. NREM sleep is increased after physical activity and has a relatively high priority among humans in the recovery sleep following extended periods of wakefulness. The EEG patterns of NREM sleep suggest that this is the kind of apparently restful state that supports the recuperative functions assigned to sleep. Stages 3 and 4 consist of relatively high voltage EEG tracings with a predominance of delta wave activity (one to two hertz). Stage 2 is characterized by intermittent waves of 12 to 16 hertz, known as sleep spindles. Stage 1 is observed immediately after sleep begins or after momentary arousals and is characterized by low-voltage, mixed-frequency EEG tracing, with predominantly theta-wave activity (four to seven hertz, that is, cycles per second). On the basis of electroencephalographic (EEG) criteria, NREM sleep is subdivided into four stages. Studies concerned with the measurement of central and autonomic activities during sleep have led to its division into two types: nonвЂ“rapid eye movement (NREM) sleep, also called orthodox or synchronized (S) sleep and rapid eye movement (REM) sleep (so called because of the rapid eye movements during this stage), also called paradoxical or desynchronized (D) sleep. Prior to the discovery and reporting of rapid eye movements during sleep, it was thought that sleep was a single state of passive recuperation in which the central nervous system was deactivated. I am off to get some sleep.NREM and REM Sleep. They can be a bit grumpy when they wake up.Д«ye for now. So, if you see a dog sleeping, let him or her sleep. It seems like it was used in French even earlier in the 14th century, in Proverbia Vulgalia et Latina, where the saying is: вЂњNe reveillez pas le chien qui dort.вЂќ Translation: Do not wake the dog that sleeps. This stems from Geoffrey ChaucerвЂ™s poem Troilus and Criseyde, published in 1374. The original quote is `It is nought good a sleping hound to wake,'(sic). Where did вЂlet sleeping dogs lieвЂ™ come from? While this sounds like a great idea, itвЂ™s not a very catchy way to say it, so I guess thatвЂ™s why this idiom is so popular! In English, we will say вЂlet sleeping dogs lieвЂ™ to mean that we should not disturb things that are calm or we should not pursue an argument that has been resolved already. However, if a dog is sleeping it is best to let him or her lie. Despite what many people will say, I donвЂ™t really have any problems with dogs. We all know that cats and dogs donвЂ™t always get along. Hey guys, itвЂ™s Studycat here! I came across another odd English phrase today, вЂlet sleeping dogs lieвЂ™.