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NBME 21 Answers

nbme21/Block 3/Question#30 (reveal difficulty score)
A 41-year-old man comes to the physician ...
Abduction of the upper extremity ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ

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submitted by โˆ—haliburton(228),
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sthi mgaie hsswo tylcmpcohiy xcitt.ioy

ihst igeam osshw ttah the dibpuul of AdTP nbhiiist NRR oioteleurbcndi( )detcsr,uea ichhw tsiihbin hte rtes dNTP nses.hyist

buons migae shwso NRR si eht rtetag of oa.yrhuyexdr

submitted by โˆ—mcl(658),
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elotdDi si dvtairneen yb axilalyr rev,en wchhi mseco ofrm troso 5/CC6. oAcistn of teh ltiodde unlcedi douciantb fo eth erupp terymx.eit

seagull  I hope everyone memorized every single part of the brachial plexus and all the roots of each, No detail let untouched!!! +30  
mcl  In case anyone else has purged the whole brachial plexus from your memory (like me), this is a great resource linked by another user. +12  
zevvyt  I thought it was radial since he lost sensation in his thumb. If Radial is C5-T1, wouldn't that be included in C5-C6? +3  
alimd  they force us to know brachial plexus like the holy bible +1  
skonys  the brachial plexus gives me the traumies +  

submitted by โˆ—poisonivy(37),
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ousqniet 153#55 ni UW nxlpiase isht eno wle.l lcs,aaByil C5 anbhsecr antrneive oitdleD dniuao)t(bc dna sxntafrluaanptIe(renis oiao)rtnt and 6C epsicB a(frmeor xnoif,)le os teh hrgti itopno hluods be dictbnoau fo teh eprpu .emiytrtex

I ogt it rgwno ghhuot llo

submitted by โˆ—misrao(4),
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lyAilaxr = B DA+C A = xirAally ev+enr B = uaoctinBd loss + C = 65C- + D = ieldoDt

misrao  sorry about formatting, couldn't get it right +  

submitted by quarantined(4),
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seedecraD osnnstsiae rvoe eth tmhub nda tonareri rerfaom dnsciiate a ilnsoe fo eth c6 ma,deemtor ihhcw is coimdfnre by teh 'nspyasciih sscsnuiopi fo /56c ervne eTh SOTM CIFCISPE ayw of cronmfgnii sthi udowl be to etst orf tiodled sumcel cnioat tocanudib( fo ulrdosh)e ncies t'si aienetdvnr by almusntosouccueu rneev 5/6c.)c( nvEe hguoth throe neervs le(ki i)arlda also sahser sorot hitw cc/5,6 etitsgn oseht renev uiostncfn ilwl nto be sa pe.icfics

kevin  Axillary controls deltoid not musculocutaneous but otherwise yes +1  

submitted by magneto(1),

Compression of the C5/C6 spinal nerves would mean the axillary nerve is compressed.

(Use the mnemonic: 5 Muskateers Assassinated 5 Rats 5 Mice, and 2 Unicorns; assassinated would be C5/C6 and axillary sounds like assassinated)

The axillary nerve innervates the deltoid muscle which abducts the upper extremity.

submitted by โˆ—burak(69),
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Is't leik rEb y.sPla ylr,xliAa cpsiralupsaasur nda ctouomsluueanscu nvere mesaadg.

burak  palsy* +  
nifty95  This is a good way to remember the upper trunk! +  

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