已领丨

　　标题：TheBestSleepPositionForClearingTheBrainofWaste
　　source：spring。org。uk
　　欲翻译的小伙伴，可评论领稿，并把已完成的译文贴在评论处或发在自己的心理圈内。请领稿的小伙伴，尽量在一个星期内完成翻译，谢谢！！
　　Onyourside，faceuporfacedown？Thepositionwhichbestclearsmetabolicwastefromyourbrainatnight。
　　Sleepingonyoursideremoveswastefromthebrainmostefficiently，anewstudyfinds。
　　Asaresult，sleepinginalateralpositionmayhelpreducethechanceofdevelopingAlzheimer’sandotherneurologicaldiseases。
　　ProfessorMaikenNedergaard，oneofthestudy’sauthors，said：
　　Itisinterestingthatthelateralsleeppositionisalreadythemostpopularinhumanandmostanimalseveninthewildanditappearsthatwehaveadaptedthelateralsleeppositiontomostefficientlyclearourbrainofthemetabolicwasteproductsthatbuiltupwhileweareawake。
　　Thestudythereforeaddsfurthersupporttotheconceptthatsleepsubservesadistinctbiologicalfunctionofsleepandthatisto‘cleanup’themessthataccumulateswhileweareawake。
　　Manytypesofdementiaarelinkedtosleepdisturbances，includingdifficultiesinfallingasleep。
　　ItisincreasingacknowledgedthatthesesleepdisturbancesmayacceleratememorylossinAlzheimer’sdisease。
　　Ourfindingbringsnewinsightintothistopicbyshowingitisalsoimportantwhatpositionyousleepin。
　　Thestudyofmicetestedthebrain’s‘cleanup’mechanisminthreedifferentsleepingpositions：
　　Ontheside，
　　facedown，
　　andfaceup。
　　Scientistsmonitoredthefilteringofcerebrospinalfluid（CSF）throughthebrainasitexchangedwithinterstitialfluid。
　　Thispathwaycalledtheglymphaticpathwayclearswastefromthebrainmostefficientlyatnight。
　　ProfessorHeleneBenveniste，anotherofthestudy’sauthors，said：
　　Theanalysisshowedusconsistentlythatglymphatictransportwasmostefficientinthelateralpositionwhencomparedtothesupineorpronepositions。
　　Becauseofthisfinding，weproposethatthebodypostureandsleepqualityshouldbeconsideredwhenstandardizingfuturediagnosticimagingprocedurestoassessCSFISFtransportinhumansandthereforetheassessmentoftheclearanceofdamagingbrainproteinsthatmaycontributetoorcausebraindiseases。
　　Thenextstepwillbetotestthefindinginhumans。
　　TheresearchwaspublishedintheJournalofNeuroscience（Leeetal。，2015）。