sleeping pattern中文Sleeping cycle 4 hoursSleep stage N15 stages of sleepSleep stageSleep stage N1, N2, N3

Stages of Sleep: REM and Non-REM Sleep Cycles - WebMD

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First comes non-REM sleep, followed by a shorter period of REM sleep, and then the cycle starts over again. Dreams typically happen during REM ... MenuNewsReferenceSlideshowsQuizzesBlogsVideosMedicationsFindaNeurologistGoodSleepHabitsSleepDisordersOtherSleepProblemsWhatAffectsSleepTests&TreatmentsTools&ResourcesWhatAreDreams?BodyTemperatureDuringSleepREMSleepHowMuchSleepIsEnough?SleepandMemoryTipsforaGreatNight'sSleepCircadianRhythmDrugInteractionCheckerInsomniaRestlessLegsSyndromeSleepApneaSnoringTeethGrindingTrackYourSleepMoreRelatedTopicsSleepDisordersReferenceMenuMedicallyReviewedbySabrinaFelson, MDonOctober16,2020ArticlesOnDreamingWhatAreDreams?BodyTemperatureDuringSleepREMSleepHowMuchSleepIsEnough?SleepandMemoryTipsforaGreatNight'sSleepAlothappensinyourbodywhileyousleep.WhenyougetyourZZZs,youcyclebetweenREMandnon-REMsleep.REMstandsforrapideyemovement.DuringREMsleep,youreyesmovearoundrapidlyinarangeofdirections,butdon'tsendanyvisualinformationtoyourbrain.Thatdoesn'thappenduringnon-REMsleep.Firstcomesnon-REMsleep,followedbyashorterperiodofREMsleep,andthenthecyclestartsoveragain.DreamstypicallyhappenduringREMsleep.WhatHappensDuringNon-REMSleep?Therearethreephasesofnon-REMsleep.Eachstagecanlastfrom5to15minutes.YougothroughallthreephasesbeforereachingREMsleep.Stage1:Youreyesareclosed,butit'seasytowakeyouup.Thisphasemaylastfor5to10minutes.Stage2:Youareinlightsleep.Yourheartrateslowsandyourbodytemperaturedrops.Yourbodyisgettingreadyfordeepsleep.This canlastfor10-25minutes.Stages3:Thisisthedeepsleepstage.It'shardertorouseyouduringthisstage,andifsomeonewokeyouup,youwouldfeeldisorientedforafewminutes.DuringthedeepstagesofNREMsleep,thebodyrepairsandregrowstissues,buildsboneandmuscle,andstrengthenstheimmunesystem.Asyougetolder,yousleepmorelightlyandgetlessdeepsleep.Agingisalsolinkedtoshortertimespansofsleep,althoughstudiesshowyoustillneedasmuchsleepaswhenyouwereyounger.WhatIsREMSleep?Usually,REMsleephappens90minutesafteryoufallasleep.ThefirstperiodofREMtypicallylasts10minutes.EachofyourlaterREMstagesgetslonger,andthefinalonemaylastuptoanhour.Yourheartrateandbreathingquickens.YoucanhaveintensedreamsduringREMsleep,sinceyourbrainismoreactive.REMisimportantbecauseitstimulatestheareasofthebrainthathelpwithlearningand  isassociatedwithincreasedproductionofproteinsBabiescanspendupto50%oftheirsleepintheREMstage,comparedtoonlyabout20%foradults.NextInDreamingHowMuchSleepIsEnough?WhyYouSnoreandHowtoStopVideo:YogaforBetterSleepWhat'sCausingYourAches?YourSleepPositionandYourHealthWhat'stheBestSleepPosition?[ss_icon]13JobsThatCanWreckYourSleepAVisualGuidetoSleepDisordersCan'tSleep?ItCouldBeWhatYou'reEatingSleepDisordersHealthCheck-TaketheWebMDSleepinessAssessment10WaystoResetYourSleepCycleTheScienceofSleepBetterSleepTipsforBusinessTripsSurvivingNightShiftSleepProblemsandHealthEffectsCircadianRhythmDisorderTopicsFightFatigue12reasonswhyyou'retired--andhowtofightthem.SleepApneaCanyoutellmythfromfact?ZzzzzzzzzzzWhatdoyourdreamssayaboutyou?Wake-UpTips11waystomakethemorningeasier.QuizWhatDoYourDreamsSayAboutYou?SlideshowHowYourSleepPositionAffectsYourHealthArticleADHDandSleepProblemsQuizWhyYouNeedZZZsSlideshowFoodsThatHelporHarmYourSleepToolsStillAwake?GetPersonalizedTipstoHelpYouSleepQuizInsomnia?TestYourSleepSmartsSlideshowSleepProblems:YourEssentialGuideWhyYouSnoreandHowtoStopJobsThatWreckYourSleepWhyYouNeedtoGetEnoughSleep10WaystoRestWithaColdVideo:YogaMovesforBetterSleepWhat'stheBestSleepPosition?HealthSolutionsPenisCurvedWhenErect?CouldIhaveCAD?TreatBentFingersTreatHR+,HER2-MBCTiredofDandruff?BenefitsofCBDRethinkMSTreatmentAFib-RelatedStrokesRiskofaFutureDVT/PEIsMyPenisNormal?RelapsingMSOptionsLiverTransplantsSaveLivesFinancePlasticSurgeryBentFingerCausesLivingWithPsoriasis?MissingTeeth?MorefromWebMD5TipstoHelpWithRelapsingMSHowtoThriveWithNarcolepsyReliefforBlockedHairFolliclesPsoriaticArthritisandYourSleepWhatPsoriasisFeelsLikeFirstPsoriaticArthritisFlareTalkingtoYourDoctorAboutRACrohn's:A'Full-Body'DiseaseAvoidingCrohn’sFlaresHealthBenefitsofHempSeedOilLiveBetterWithPsoriaticDiseaseTypesofB-CellTherapyforMS5HealthBenefitsofHempWhyProstateCancerSpreadsLivingwithAdvancedBreastCancerWhereBreastCancerSpreads

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