英语演讲ppt文本.docx

英语演讲ppt文本

第一篇：英语演讲ppt文本Learntosleep1.基因中什么决定你的睡眠类型Peoplealwaystellmethatthemostaccomplishedpeopleintheworldgetupsuperearly,workingoutandhavingmeetings.Itseemsright.Butsometimesit’sreallyhardtowakeup.Why?Theremightjustbepartofyourgenes.Genetiesdeterminehowfastorslowourinternalclockruns.Andasaresult,howcloselyitandourbody’sfunctionsalignwiththe24-hourday.HarvardMedicalSchoolsays,ifyourclockrunsfast,you’remorelikeiytobeamorningperson,andifrunsslowyou’reanightperson.Inthe2012study,scientistsfoundasinglenucleotideonthe“Period1”genewhichhelpscontrolthedailybehavioralclockandcorrelateswithwake-sleepbehavior.Theresearchesfoundthatthenucleotidebaseadenineislinkedtosomeonebeingamorningperson,whileit’sbasepairguanineislinkedtobeinganightowl.So,peoplewithAAgenotype,onaverage,wakeupearlierthanpeoplewiththeGGgenotype.Butyoucanhavegenesthattellyourbodyallsortsofthingsifyouwanttobeadaymanorfighterofthenightman.Wecalledthisthingacircadianrhythm.It’saroughly24-hourcyclecontrolledbythebrainthattellsuswhentowakeup,togotosleep,andotherbiologicalprocessesinbetween.2.Doessleepingearlyandgettingupearlyreallyhelpimprovesleepquality?Weknowthatthebrainemitsbrainwavesduringactivity.Bymonitoringyourbrain'sbrainwavesscientistshavediscoveredfivestagesofsleep:Stage1SleepInthefirststage,peopleareconscious.Forexample,whenyoulistentoboringlectures,lectures,andmeetings,youfallasleep,daydream,andevenfallasleeponthespot.Atthispoint,yougettothefirststageofsleep,inwhichourbodiesbegintorelax,andourbreathingandheartratebegintodropslightly.Stage2SleepDuringthesecondStageofSleep,somescientistsbelievethatinasense,thebraingraduallyshutsdownitswakingactivity.Atthisstage,itiseasytowakeup.Infact,inmanystudiesofsleep,mostpeoplewhoarewokenupduringthesecondphaseofsleepstillthinkthey'renotasleep.Mostoftheclassesandmeetingsthatgotosleeparebasicallyatthisstage.Deep-sleep(第三四阶段)Inthethirdandfourthstagesofsleep,wehavethelowestfrequencyofbrainwaves.Duringthesetwostages,wereallyfallasleep,sothesestagesarealsoknownasdeepsle