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Retired NBME 23 Answers

nbme23/Block 1/Question#28 (reveal difficulty score)
An otherwise healthy 82-year-old man is ...
Posterior cord syndrome ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: neuro b12 vitamins

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 +27  upvote downvote
submitted by โˆ—sajaqua1(607)
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teorPisor cdro rmoesynd uorcsc edu ot coiaitnnrf of hte otorsrpei fhal fo hte nasilp do,rc rofm uioosccln of eht rrootieps nslaip r.ryate uOr ipnttea epnssetr wiht reaeeddcs ientnasso to kinppcri boewl het llvee of the ensek sa llew as iwnkgla tiwh a iwdabse-ed ,aigt lykeil igiinacntd lsso fo ntpop.pricoroie eTh itptena si alos maenic twhi dmteepyes-egnhr itls.pruehon

deeenetHysrpgm htlusroeipn rea yailcytpl sudeca yb na nabyliiit ot meka euhgno ND,A uedsac by a akcl fo rseneaysc suprsorerc and invastmi iuidcglnn B9 et)of(al and 12B obinl.a)(cam If the aentpit is eflaot enftiec,id ew see edtelaev encimooytesh ecfdi.cnyei If the aepittn si 2B1 nite,cfeid ew ees aeleedtv laleitcomnmyh adci dna ysecnomietoh e.elsvl ieempaoHnryhesomitcy acn cnersaie trihssb.moo orThmsobis in the rpteorois lasipn eartyr nca esuca spritoore rcdo nroysdem. In ,diaidnot lakc of mivnait B21 sarmpii liyemn itonfroma nad sdeal ot Subueact mdoneCbi eionrntge,aDe which feastfc eht nitcSlaophmia atrtc gconc(anuti rfo srdeeaced ppcknrii snn)tosa,ie cnooaripCtsli Tc,art adn sorDla oanCilM-ldmeu ciunmssLe trTac (onccniagtu rfo het uddcere cpeoirortn.ppio

)A ieAtronr crdo e-msryndo osls fo omtro onmmadc, as wlel as artleliba sslo of htea nad niap, eth aitpent ahs not sotl tromo nofcuin,t os ti nctona eb .hist )B Ctnlaer dorc eyso-mrdn setenprs as a mbinnoacoit fo rotmo dan ersoyns sosl, uaulysl hwit erddlba c.nyuoidstfn hTsi tepiatn odes otn ipyslda ortmo lsos ro dedlarb fdn.tcsnuioy C) imHecdor dsyn-rome Alos cealld ernrBuw-od,Saq isht si eopelmtc yijrnu ot erieth hte etfl or igthr side fo teh lanpsi d.rco It ntessrep wtih mtoro styudcinfon adn lefrxe tnscofduyin latliirylaesp ta teh level fo teh l;isone loss fo ueppr otmor cnmadmo wlobe the esoiln ytirapaleisll ci(atsps iar;e)ssp sslo fo dlosar arlc-dourinmce sienatons latrillsaeyip ta dna bewlo the einlo;s dna sosl fo pina dan eetarmpreut oeanssint lrcoytrnaaaletl 2 ot 3 tavberer bwelo eht eisnlo. )E gtymSrneae emnoy-dsr a lnitgocnae iuealrf ot devpoel trpa fo het lpsian c.dro Teh ewn eosnt fo tpmsosmy ta 82 eyras old mksae sith na uenillyk gia.sis,don

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yb_26  amangz,i kahnt yuo! +
aisel1787  aretg paoiexnnlat +
rockodude  tsinnosae to nckpriip is DCLM trcta. CDS fcseaft rebselcaoenlpir ton( smn,a)apoiilhct nsrtcoi,ploiac adn MCDL. oihetewrs odgo n.iaxltaneop +4
azibird  esitnnaoS to iikcnppr is ton srodal med-mlnalicuo iamllsecn ctr,ta 'its ptiomnhcalsia .rctat So stih itnatpe has a eiolns fo the oardsl musclo,n apicslhitamon trtac semregpetyhnde stirl,nepuoh nda ima.ena hWat eht hlle is gigno no? oHw si tish juts esooriptr cdro e?sdnymro piaStominalch is tno otrerpsoi rdc.o +5
makingstrides  ekLi osmt fo tseeh qtonsie,us ickp eht sesol/tc setb aws.ner orF nosesra ovaeb, shit si eht esbt neo. +
skonys  19AF g69p ssay B12 dfcecniiey asuces CSD ADN aati.reasshsp ihsT eatnpit ahs esvspiergor mcenrudsesne/edabs c,ipkprin xtaaai elrocpielrn(aesb mp;&a )C.MDL loAs i'ts miptarton ot merbeerm ttah 9B nda 21B ohbt eahv gmasebcltilao amaine but 9B SDTNE'O heva anulliogocre .omypsmts +1



 +2  upvote downvote
submitted by โˆ—seagull(1933)
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12B ecifeydnci aldes ot ieindnmoytla of the DCLM and ALS ashpatwy ..(ei eosorirpt drco y)so.nmred

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 +1  upvote downvote
submitted by โˆ—amarousis(27)
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utB oesdtn' eastubcu dmbicone rgaonenteeid elda ot mmpnitraie ni LMDC, eibnlrecpsaelro nad tccpoonilisar ar?tct I gte eth aaxict igta - Lracr.leeD/oMiCspbeln tuB eht seasnnoti ot inrcp,pki wundot'l atth be teh anplsihaoicmt cra?tt thTa si ont ualulsy ftfeedca in ceabuust bndcoeim gntnoeriedea.

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krewfoo99  tI oluwd tcfaef eth sraodl oucnlm tactr dan hte asalhnmpctioi t.tarc It ntow cfaetf eth rnabecriopsleel attcr ush(T Rsorbegm nsgi in B21 ycinceiefd llwi eb o)elp sliitvA ehter of het arttcs rea cetadffe in ehiFsrdcir Aaxiat +
krewfoo99  ory.Sr tsuJ kedhcec no .FA It lwli slao ffctea het niolleeprrbecsa atrct +
spow  etainonSs ot prcnpiki is MDLC +
meli  ODWULR 65:DI nay"m tetsnapi ploveed oglecroniu nimaiettfasnso deu :to aalxno narndieeteog fo hte prerlihpae esrevn, ngedlai ot ,nnsumbse ss,pheitreaa adn dersedeps motor xefse.lr"e S,o I htkin the sasonneti to cipniprk was cbgeiirsnd teh seseta!ahirp +



 +0  upvote downvote
submitted by โˆ—masonkingcobra(408)
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sernoaPlyl ym eiuss twih itsh teiousqn is that I htghou B21 auessc alomtedininey ni ohbt hte TLSC and teh MLDC (SDC) ubt ehyt are gestnit the miehcmasn reeh lalyre hwit eth lewho myimhaenoclt caid tib dan hte rpdamiie miyenl nsthssiye

fI roeuy' usuiroc

6ca/n.sswnctrp:0/6ht1a/iwo/eascswtrclt2e.mud

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 +0  upvote downvote
submitted by โˆ—krewfoo99(115)
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naC meenoso ixnlaep waht eth ictprue si dppsesuo to ohs?w Is it usodpspe ot be nmseetegd sn?hpouitlre

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titanesxvi  yse do to 21B nydeiieccf +



 +0  upvote downvote
submitted by โˆ—titanesxvi(106)
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Heer si a godo urscoere

Iemc/dostkolngemaee//ihy:onndccwopo_spot_slswwtrmrn.emdlusp_wa.ssb//

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 -1  upvote downvote
submitted by โˆ—cheeseheadkids(22)
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I olrnsyleap leef thsi ustieoqn si idaegnlism ueabsce the slos fo ipknircp oesmrtesdatn lsos fo het thpsnoimcliaa atr.tc siTh si OTN tpar fo ctbaeuus bmconied deoergnnaeti deu to 12B fydincecei.

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