字典翻译 问答 小学 英语 AteamofresearchersinCaliforniahasdevelopedawaytopredictwhatkindsofobjectspeoplearelookingatbyscanningwhat’shappeningintheirbrains.Whenyoulookatsomethingyoureyessendasignalaboutthatobjecttoyour
问题标题:
AteamofresearchersinCaliforniahasdevelopedawaytopredictwhatkindsofobjectspeoplearelookingatbyscanningwhat’shappeningintheirbrains.Whenyoulookatsomethingyoureyessendasignalaboutthatobjecttoyour
问题描述:

AteamofresearchersinCaliforniahasdevelopedawaytopredictwhatkindsofobjectspeoplearelookingatbyscanningwhat’shappeningintheirbrains.

Whenyoulookatsomethingyoureyessendasignalaboutthatobjecttoyourbrain.Differentregionsofthebrainprocesstheinformationyoureyessend.Cellsinyourbraincalledneurons(神经元)areresponsibleforthisprocessing.

ThefMRI(functionalMagneticResonanceImaging功能性磁共振造影)brainscanscouldgenerallymatchelectricalactivityinthebraintothebasicshapeofapicturethatsomeonewaslookingat.

Likecellsanywhereelseinyourbodyactiveneuronsuseoxygen.Bloodbringsoxygentotheneuronsandthemoreactiveaneuronisthemoreoxygenitwillconsume.Themoreactivearegionofthebrainthemoreactiveitsneuronsandinturnthemorebloodwilltraveltothatregion.AndbyusingfMRIscientistscanvisualizewhichpartsofthebrainreceivemoreoxygen-richblood--andthereforewhichpartsareworkingtoprocessinformation.

AnfMRImachineisadevicethatscansthebrainandmeasureschangesinbloodflowtothebrain.Thetechnologyshowsresearchershowbrainactivitychangeswhenapersonthinkslooksatsomethingorcarriesoutanactivitylikespeakingorreading.ByhighlightingtheareasofthebrainatworkwhenapersonlooksatdifferentimagesfMRImayhelpscientistsdeterminespecificpatternsofbrainactivityassociatedwithdifferentkindsofimages.

TheCaliforniaresearcherstestedbrainactivitybyhavingtwovolunteersviewhundredsofpicturesofeverydayobjectslikepeopleanimalsandfruits.ThescientistsusedanfMRImachinetorecordthevolunteers'brainactivitywitheachphotographtheylookedat.Differentobjectscauseddifferentregionsofthevolunteers'brainstolightuponthescanindicatingactivity.Thescientistsusedthisinformationtobuildamodeltopredicthowthebrainmightrespondtoanyimagetheeyessee.

Inasecondtestthescientistsaskedthevolunteerstolookat120newpictures.Likebeforetheirbrainswerescannedeverytimetheylookedatanewimage.ThistimethescientistsusedtheirmodeltomatchthefMRIscanstotheimage.Forexampleifascaninthesecondtestshowedthesamepatternofbrainactivitythatwasstronglyrelatedto

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