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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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tiPrroose droc mroynesd sucocr due ot ncarniotif fo the rsotperio hafl fo het sapnil ,cdor romf uscciooln fo eth riropeost nialps yr.aert Oru aietnpt restpsen twhi ddaecerse seontsnia to pciirpnk elwbo the vleel fo eth sknee as llew sa wnlikga wiht a we-ideabsd ,tgai eillyk dicnitigna lsos of proniteicp.oopr eTh ipeantt is loas meiacn whti -etdenpmeehgysr e.lphsonutir

erdHemyptenegs prhunsoltie rea lycipaytl dceuas by na tlnyiiiab ot ekam huneog N,DA udaesc yb a klca of aresescny oecrrpruss nda atmiisvn gidninclu B9 aotle)f( nad 12B ()cl.aibamno fI hte ptnaeit is aelotf i,netciefd we ese evtaedle otmnehosieyc cenicey.dfi If teh ipttnae is 21B if,eentdci ew ees tdevelae neylhocamimlt cdia and ihtcomsoynee lvel.se oehcHrmmeyaoyiseptni cna rceniase hs.otimrsbo Thossorimb ni eth posoritre alnsip eyrrat anc sucea rsoproiet dcor .msyroedn In a,dtodiin cakl of imvatni 21B sairpmi myenil tnroaomif and salde to bcaeutuS inbmoeCd gDnnari,oeete which ftcfsea hte Snalciaithmop tactr an(toiucncg for cseeedrad cpkiinrp ntn)asois,e pootanlisrCic cTtar, dan rolasD mlueolnd-CaiM uniLscesm tcraT c(uiatnncgo ofr eht rddueec oppc.rpeniooitr

A) tArneoir codr synorm-ed osls fo rmoot adnocm,m sa llew sa ilalrtbea olss fo taeh adn ap,in eht tieantp ash tno lots ormot nt,ncfiou so it noactn be t.ihs )B Crntale odcr edrnoms-y rneepsts sa a iniamcbnoto of trmoo dan srysoen slo,s luylsua ithw bdareld uinfsdny.tco iTsh tipetna odes tno dailysp tomro sslo ro ladredb iynt.oucnsdf C) doriHmce ydrnesm-o osAl ldacel BSn,druo-qaerw hsti is opctlmee nyijru ot hteeri eth lfte ro hrtgi side fo eth slpain codr. It nesseptr thwi rtmoo tnuysnicodf adn leerxf indoftcsynu tliayiesaplrl at eth evlel fo hte ;ineols loss of pepru romot cdnaomm beolw eht lnesio lyelliarstiap i(tcapss ei)rpass; olss of slodar cidur-nelcrmao eosasitnn ityslaprlilae at and lwebo eht s;eolni dna sosl fo pani nad uerepartetm snositnea rytcnlaetralloa 2 to 3 raevbetr lebwo hte nlieos. E) enaymSrgte dno-ryesm a gncatielon ueirafl to eovdlep trpa fo het pnaisl do.rc Teh ewn tonse of ymstmspo at 82 sreay lod kaesm isth na kleynilu ,sisaognid.

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yb_26  m,naazgi thnak yu!o +
aisel1787  reatg nepaaixtnlo +
rockodude  soastnnei to npcpkiir si LMCD tart.c CDS ecsftaf aieseplclrnoreb ton( amnlisa,i)phcot alcstrcionpoi, and .CLDM retwohsei oodg onlt.eanxpia +4
azibird  toensnSia to ippncikr is ont soladr aoldce-ummnil imsalclne tract, is't omtlniihasapc .rctat oS isht apetnti sah a ionesl fo eht doalrs uc,lmnso asophtiiacmnl rctat mngereeypehdts ,slpoethurin adn anem.ia hWat the llhe si ioggn ?on wHo is isth tsju oestioprr cord dys?omern ponmthaaciilS is not oteorsirp ro.dc +5
makingstrides  kieL mots fo ehest tosnuis,qe ikpc eth osst/lec tseb .nersaw For rsnaeso b,oave isth si eth tbes on.e +
skonys  F19A p6g9 yssa 12B niceydefci uassce CSD DAN spsitsehraaa. hTsi titpaen ash eosgisrvpre mss/ncebdunasdreee cirki,npp aaaitx iresanl(loceebpr ±a L)D.MC osAl 'tsi pmrotntai to bmmereer htat 9B nad 21B btoh aehv bcalgaoseltmi aamnie but B9 TSOEDN' have aogonircllue ptmm.soys +1



 +2  upvote downvote
submitted by โˆ—seagull(1933)
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21B fydceiiecn dlaes to ydtminilneao of the DCLM nda SAL yaatpswh ..e(i orispteor cord nm.r)syeod

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 +1  upvote downvote
submitted by โˆ—amarousis(27)
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But os'tned tsucebau bdmencio ieeaentdongr lade to memaipnrit in ,MCLD ierpllnsebaeroc dna satcplncroioi tr?tac I gte teh xctiaa atgi - icCrlnroeeM/LDapsb.le But teh stsninoea ot pkrpnc,ii lnd'otuw atth be het mhaaitncplios ta?crt hTta si tno ulualys dffcatee ni uacsteub mdonecbi enadnoterige.

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krewfoo99  tI wulod cteffa the asrlod nmucol cttar nda eht alcsiphomntai rttca. It onwt fctafe het loniblerecesrap acttr (hTus bRreosmg nsgi ni 21B dceyicenfi wlil eb il)iosAvelp t rhete fo teh rtscta are affteecd in iierdFhrcs xaitAa +
krewfoo99  .orySr Just dekcceh on F.A tI will aols efcfta hte eeasplcirrbonel tacrt +
spow  oitenaSsn ot npicipkr si DMLC +
meli  WLRDOU 6D:I5 mn"ya isenptta oeelvdp eulocoirng fsiennaotmtias due o:t onlxaa teonindearge fo hte ealiephprr eevsrn, ganeldi to senun,msb ress,ieathap adn seedrdeps ootmr "s.erelfex So, I nhikt the naeontssi to kppcnrii asw greidbncsi het ae!shepirsat +



 +0  upvote downvote
submitted by โˆ—masonkingcobra(408)
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yaPnoslrel ym iessu twih thsi etqnsuio is that I ougthh 21B seuacs ydnaieiteomnl in htob eth LCST and teh DLCM D)(CS tbu ehyt are nigttes eth inmsmceah rhee yllare ihwt teh lhwoe ncymtliameoh diac tib dan eht ideiaprm einmly ishsntyes

If uoey'r uiocrsu

trus./:ceswn.c///rpcna10sodttatl6awhsi62ecmw

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 +0  upvote downvote
submitted by โˆ—krewfoo99(116)
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anC nseoemo napxeil htaw eth picrute is spuspdoe to ?wsoh Is it sodespup ot eb seneegtdm t?oehrinupls

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titanesxvi  eys od ot 12B ncfdieceyi +



 +0  upvote downvote
submitted by โˆ—titanesxvi(106)
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eerH is a dogo rorecseu

.otnstkcwa_mrn/domodnespcl/we./diw_sIulse/hecomlamootspyg:nw_pse/brs

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 -1  upvote downvote
submitted by โˆ—cheeseheadkids(22)
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I lryaopensl eefl shti eqtsioun si smlenigdia asecebu eht ssol of pricknpi tdtmrosnease osls of teh nopclhamtasii ttrc.a Tish si TNO prta of buteucas codnbmei tneienoeagrd deu to 12B iyenf.diecc

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