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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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sePoitror ordc dnormsye ruoccs eud to ancnioftri of the eroptoris flha of het spanil ,codr rmfo ooclinsuc fo the ertrospoi nspail .rtarye uOr ttaeipn setspenr htwi eeecdasdr snneaisot ot krcinipp elwbo eth leelv fo het sneek sa well sa ingkawl wiht a deiedsw-ba a,tgi lkelyi ncigdianit sslo fo ioronppieoptcr. ehT tpeiant is lsoa mancei twih gypedmheeren-st .ieorltpsuhn

msgnepyHederet psorunitelh era alictlypy cadeus by na aybiilint ot meak hoeugn A,ND udaecs yb a lack fo ssyarceen srsrucroep adn mvisitna uliicndgn B9 (f)lotae nad 2B1 c().aiobanlm If eht tanetpi is altoef ,ciedfneit ew ees eeadlevt eyohtnsmiceo yic.fdneiec If teh taietpn is 1B2 ie,teifndc we see lvaeetde hneoilalmymtc idac dan etmsiechonyo l.eesvl aoyipoHeynestmhecirm cna csnariee hboisrsmot. mTobshsior ni hte pesorrito apisnl rytaer acn eusca torserpio rcod snedomry. nI doni,iadt lcka of iivnatm 1B2 pmsairi nymile rmatfonoi nad sleda to utuabSce bdneioCm gtao,eneDneir wichh tcsffae hte niiahSlptcoam atctr nont(cugica rfo daecesedr nckppiri ,tinne)aoss lonsapCrtoiic rTc,ta nda ralosD ileaum-dMolnC ncsiumeLs ractT cainot(ugnc fro the uerdcde irnotpipooc.erp

A) oAtrrnei ordc dymnes-or lsos fo mtroo nomcad,m sa llwe as leatabrli sols of teah dna p,nai eht nteapit has ont tosl mtroo nicf,notu so ti tconan be shti. B) talCenr crod oynre-mds netsresp sa a nciooitmanb fo ormto dan ssnoyre ,loss lysauul hitw rblddae ynsiutnd.fco hiTs eitaptn esod not lyapsid tmroo sslo or eardbdl stnnudi.cfoy C) iomdercH nym-eorsd Alos adllec ,wdSqar-urBeno itsh is mpeetcol jiynru ot herite eth ftel or gtrhi idse fo eht nlspai dor.c tI pnsstere iwth omotr sodfuincynt nad rflexe ctnsdyiufno yelirslpaalit at hte lvele fo hte loein;s loss of epupr orotm dmoacmn woelb eht lsnieo ealillitsryap p(ctsasi s)sr;apie sols of rdsloa iro-mlucencdar stoienans aysltllreapii ta and elbwo hte l;enosi nda ossl fo pina dna rmrauetteep stsainneo caoellyntraralt 2 to 3 etbaervr welbo teh eos.nli )E rtnmyageeS dnmrso-ye a iealtcnngo faiuerl ot eedlvop tarp fo het anpsli .dcor eTh enw teson of systmopm ta 28 rayse old amsek stih na iekunyll ,igss.aindo

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yb_26  gzia,nma hkant o!uy +
aisel1787  tgrea annetolaixp +
rockodude  easonsitn to prpicnki si MDCL acrtt. DCS tcsfefa rneealslbreicpo tn(o iia)sc,ptlmnaoh irs,ococlnapit dna D.MLC reeoihwst dgoo pteonnlai.ax +4
azibird  neatSsnio ot ipkicnrp si ton sdlaor -iucmoaendllm ceanlsiml tca,tr 'sti aimclsptaohin at.ctr oS htsi ptaeint has a sileon of het aorlsd ncsolm,u ncapslohtmiia tctar preymdetsnheeg iuhrpnlesto, dna enamia. ahtW eth llhe is oingg o?n wHo si hits sujt porterosi droc snme?odry olpatnhcamSii is not orsitorep .rdoc +5
makingstrides  ekiL tsmo of seteh tsi,uonesq kcip het tos/csel setb nsrwae. For raseons o,aevb thsi is het sebt neo. +
skonys  F9A1 9g6p yssa 2B1 edcecfiiyn sausce SDC ADN p.hterisasasa ishT aenpitt hsa eorrsisepgv asdueessmnedncebr/ icpnk,ipr tiaaax roareebllcnpes(i &;pam LC)MD. oAsl 'ist ptntoiram to mrrmeebe ahtt 9B dna B12 othb veha aasigbcletolm aeanmi utb 9B TDOENS' vaeh olaicunrleog pmmsst.oy +1



 +2  upvote downvote
submitted by โˆ—seagull(1933)
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B12 cfndciiyee daels to iayldinmeont fo teh MCDL nad ASL wsytaaph i..e( sipetoorr odcr n.)yeosdmr

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 +1  upvote downvote
submitted by โˆ—amarousis(27)
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But s'edton ecabusut ediobncm ideaernontge dela ot ipnmimerta ni ,LMDC rrollenapebcesi nad slnicaotrciop rtta?c I teg eht xatcai tiga - bCeeDnpaolrLeci/M.slr But teh sonatsnei ot rnpkpii,c l'wtoudn thta eb het staopiamniclh crt?at Taht is nto llyuuas efeadfct in beucuast eobdmnci otidegn.eeran

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krewfoo99  It wolud afetfc hte ldrosa uomlnc crtta nad eht pascmoniihlat rt.tca It ntwo atcfef hte eroeprelnbiascl rttac (sThu sRgerbom isgn ni B21 icceinydfe lwli be sv)lAoietpil eterh of the tscart era efaftdce ni idFrrecish tAxaai +
krewfoo99  Srryo. ustJ dkecech on .AF tI ilwl soal cefatf teh slrirecepelbano tactr +
spow  anontSise ot kcirnpip si CMLD +
meli  UDOLWR I:56D a"nmy tnapites eeldvpo giueclnoor neiastfsnitmao eud ot: lnaaxo goinadreeetn fo eht erhppleria enervs, ilnadge to nsnesmu,b eips,hetaars nad despreeds oomrt r"efseel.x o,S I khtni teh tnaonseis to kirinpcp saw cbgridseni eht apst!reahies +



 +0  upvote downvote
submitted by โˆ—masonkingcobra(408)
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Prloaensyl my ueiss ithw shit uiesntqo is atth I hghuto 21B cuases dntonyelamiei ni btoh the TLSC nda het DLCM SDC)( ubt yeht era tengsti hte hnmcasime reeh rlyeal twih eth ewolh ychtnmmaeilo daci tbi dan the idepraim yneilm nhsetsiys

If yeou'r rucsiou

ea2/dstseaw/cnp/.t0itwt6clwa:ms1hn6.cuc/rsro

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 +0  upvote downvote
submitted by โˆ—krewfoo99(115)
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Can seonmeo plinaex awth hte eprtciu is suoeppds to hw?so Is ti ppusdeos to eb nmgsetdee t?huioelsnpr

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titanesxvi  esy od ot 12B yefinccied +



 +0  upvote downvote
submitted by โˆ—titanesxvi(106)
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Here is a ogod seruecor

/s/pd.r/tspmo__ed_eeeweso.oatrmmlswsIknpcdnsmcnutws/gchal:yo/biwonlo

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 -1  upvote downvote
submitted by โˆ—cheeseheadkids(22)
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I pesyrnllao elfe hits oeniqstu is dsingmelai sacbeue the olss of rikcpipn esdtanosmetr sslo fo het olamtaisphinc .ctrat shiT si OTN artp of ubaectus mdnboiec rtaeogndneei deu to B12 ecc.idneyfi

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