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1、Ofallthecomponents0f'agoodnight'ssleep,dreamsseemtobeleastwithinourcontrol.Indreams,awindowopensintoaworldwherelogicissuspendedanddeadpeoplespeak.Acenturyago,Freudformulatedhisrevolutionarytheorythatdreamswerethedisguisedshadowsofourunconsciousdesiresandfears。
2、bythelate1970s,neurologistshadswitchedtothinkingofthemasjust"mentalnoise"—therandombyproductsoftheneural-repairworkthatgoesonduringsleep.Nowresearcherssuspectthatdreamsarepartofthemind'semotionalthermostat,regulatingmoodswhilethebrainis"off-line".Andoneleading
3、authoritysaysthattheseintenselypowerfulmentaleventscanbenotonlyharnessedbutactuallybroughtunderconsciouscontrol,tohelpussleepandfeelbetter."It'syourdream,"saysRosalindCartwright,chairofpsychologyatChicago'sMedicalCenter."Ifyoudon'tlikeit,changeit."Evidencefrom
4、brainimagingsupportsthisview.ThebrainisasactiveduringREM(rapideyemovement)sleep—whenmostvividdreamsoccur—asitiswhenfullyawake,saysDr.EricNofzingerattheUniversityofPittsburgh.Butnotallpartsofthebrainareequallyinvolved,thelimbicsystem(the"emotionalbrain")isespec
5、iallyactive,whiletheprefrontalcortex(thecenterofintellectandreasoning)isrelativelyquiet."Wewakeupfromdreamshappyordepressed,andthosefeelingscanstaywithusallday,"saysStanfordsleepresearcherDr.WilliamDement.Thelinkbetweendreamsandemotionsshowsupamongthepatientsi
6、nCartwright'sclinic.Mostpeopleseemtohavemorebaddreamsearlyinthenight,progressingtowardhappieronesbeforeawakening,suggestingthattheyareworkingthroughnegativefeelings,generatedduringtheday.Becauseourconsciousmindisoccupiedwithdailylifewedon'talwaysthinkaboutthee
7、motionalsignificanceoftheday'sevents—until,itappears,webegintodream.Andthisprocessneednotbelefttotheunconscious.Cartwrightbelievesonecanexerciseconsciouscontroloverrecurringbaddreams.Assoonasyouawaken,identifywhatisupsettingaboutthedream.Visualizehowyouwouldli
8、keittoendinstead,itoccurs,trytowakeupjustenoughtocontrolitscourse.Withmuchpracticepeoplecanlearnto,literally,doitintheirsleep.Attheendoftheday,there'sprobablylittlereasontopayatten
