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1、智课网TOEFL备考资料托福阅读材料之人的头颅也能移植？Thefirsteverhumanheadtransplantisnowpossible,aneurosurgeonhasclaimed.DrSergioCanaverobelievesthatthetechnologynowexiststhatwillallowsurgeonstocarryouttheFrankenstein-styleprocedure,whichhasbeentestedoutonanimalssince1970.Upuntilnowtherehasbeennow
2、aytosuccessfullyreconnectthespinalcord,leavingthesubjectsparalysedfromthepointwherethetransplantwasconnected.Recentadvanceshavemeantthatre-connectingthespinalcordisnowpossible,anditisbelievedthatthebreakthroughmeansthatpreviouslyfataldiseasescouldbecured.However,otherexpert
3、shavedismissedtheidea.ProfessorAnthonyWarrens,fromtheBritishTransplantationSociety,toldtheSun:"Connectingaheadtoabodyisworthlesstohumanbeingstoday.Thewholeconceptisbizarre."In1970RobertWhitesuccessfullytransplantedtheheadofarhesusmonkeyontothebodyofasecondrhesus,andDrCanave
4、ro,amemberoftheTurinAdvancedNeuromodulationGroup,hasproposedusingasimilarmethod.Hesaid:“Thegreatesttechnicalhurdletosuchendeavourisofcoursethereconnectionofthedonor'sandrecipient'sspinalcords.Itismycontentionthatthetechnologyonlynowexistsforsuchlinkage,”hewrote.“Itisarguedt
5、hatseveraluptonowhopelessmedicalconditionsmightbenefitfromsuchprocedure.”Hebelievesthatitateamof100couldperformtheoperationin36hours—atacostof£8.5million.Bothheadswouldhavetoberemovedatthesametime,andreconnectedwithinanhour."Thisisnolongersciencefiction.Thiscouldbedonetoday
6、—now.Ifthisoperationisdoneitwillprovideafewpeoplewithasubstantialamountofextralife,”hesaid.“TheonlyreasonIhavenotgonefurtherisfunding."However,DrCalumMackellar,fromtheScottishCouncilonHumanBioethics,added:"Thissoundslikesomethingfromahorrormovie."据外国媒体7月3日报道，日前，意大利都灵一位名叫塞尔吉
7、奥•卡纳韦罗的神经外科医生表示，人类可能首次实现头颅移植。头颅移植主要的障碍就是脊髓的再接合，移植完成后如果无法实现脊髓结合，病人就将瘫痪。不过，最近的科研进展让这一切成为可能，这种突破意味着以前许多不治之症也有救了。1970年，美国神经外科医生罗伯特•怀特成功将一个猕猴的头颅移植到另一个猕猴身上，因此，卡纳韦罗医生也想利用相似的方法进行人类头颅移植。“这种先进的技术不仅存在于科幻小说中了，如今在现实生活中也可以实现。如果这种手术能成功的话，那么将会给一部分人带来福音，他们的生命或许会因此延续，”卡纳韦罗说。卡纳韦罗认为，100名医生组成的专
8、家小组在36小时内就可以完成这种手术，手术过程中供体和受体的头颅要同时分离，并在1小时内完成交换的重新接合。该手术的成本花费大约为850万美元。“目前，我没有继续研
