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Ofallthecomponentsofagoodnight’ssleep,dreamsseemtobeleastwithinourcontr ol.Indreams,awindowopensintoaworldwherelogicissuspendedanddeadpeoplespeak.Acenturyago,Freudformulatedhisrevolutionarytheorythatd reamswerethedisguisedshadowsofourunconsciousdesiresandfears;bythelate1970s,neurologistshadswitchedtothinkingofthemasjust“mentalnoise”--therandombyproductsoftheneural-repairworkthatgoesonduringsleep.Nowresearcherssuspectthatd reamsarepartofthemind’semotionalthermostat,regulatingmoodswhilethebrainis“off-line.”Andoneleadingauthoritysaysthattheseintenselypowerfulmentaleventscanbenotonlyharnessedbutactuallybroughtunderconsciouscontr ol,tohelpussleepandfeelbetter,“It’syourdream,”saysRosalindCartwright,chairofpsychologyatChicago’sMedicalCenter.“Ifyoudon’tlikeit,changeit.”
Evidencefrombrainimagingsupportsthisview.ThebrainisasactiveduringREM(rapideyemovement)sleep--whenmostvividdreamsoccur--asitiswhenfullyawake,saysDr,EricNofzingerattheUniversityofPittsburgh.Butnotallpartsofthebrainareequallyinvolved;thelimbicsystem(the“emotionalbrain”)isespeciallyactive,whiletheprefrontalcortex(thecenterofintellectandreasoning)isrelativelyquiet.“Wewakeupfromdreamshappyordepressed,andthosefeelingscanstaywithusallday.”saysStanfordsleepresearcherDr.WilliamDement.
ThelinkbetweendreamsandemotionsshowupamongthepatientsinCartwright’sclinic.Mostpeopleseemtohavemorebaddreamsearlyinthenight,progressingtowardhappieronesbeforeawakening,suggestingthattheyareworkingthroughnegativefeelingsgeneratedduringtheday.Becauseourconsciousmindisoccupiedwithdailylifewedon’talwaysthinkabouttheemotionalsignificanceoftheday’sevents--until,itappears,webegintodream.
Andthisprocessneednotbelefttotheunconscious.Cartwrightbelievesonecanexerciseconsciouscontr oloverrecurringbaddreams.Assoonasyouawaken,identifywhatisupsettingaboutthedream.Visualizehowyouwouldlikeittoendinstead;thenexttimeisoccurs,tr ytowakeupjustenoughtocontr olitscourse.Withmuchpracticepeoplecanlearnto,literally,doitintheirsleep.
Attheendoftheday,there’sprobablylittlereasontopayattentiontoourdreamsatallunlesstheykeepusfromsleepingor“wewakenupinapanic,”Cartwrightsays.Terrorism,economicuncertaintiesandgeneralfeelingsofinsecurityhaveincreasedpeople’sanxiety.Thosesufferingfrompersistentnightmaresshouldseekhelpfromatherapist.Fortherestofus,thebrainhasitswaysofworkingthroughbadfeelings.Sleep--orratherdream--onitandyou’llfeelbetterinthemorning.
31.Researchershavecometobelievethatd reams________.
[A]canbemodifiedintheircourses
[B]aresusceptibletoemotionalchanges
[C]reflectourinnermostd esiresandfears
[D]arearandomoutcomeofneuralrepairs
正确答案：A
