share email twitter ⋅ join discord whatsapp(2ck)
Free 120  NBME 24  NBME 23  NBME 22  NBME 21  NBME 20  NBME 19  NBME 18  NBME 17  NBME 16  NBME 15  NBME 13 
introducing : the “predict me” score predictor NEW!

NBME 23 Answers

nbme23/Block 2/Question#47 (33.8 difficulty score)
A 65-year-old man is scheduled for physical ...
Medial (internal) rotation🔍

Login to comment/vote.

Tutor box

Members from the Leaderboard offering 1-on-1 help: Want to be listed here? Email us!

submitted by guillo12(47),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

The ipssarsacuubl usmecl is vyre mratinotp rof the lntneaIr onaiotrt of het .seuumrh Teh trianlne aointrto tprsopsu eht puerp ram rdginu nudioatcb dan tiondac.ud

hreeT ear semo nabd sesxciree atth nca elhp you tseghrtn teh aiaubsurSscpl mu.e.l.cs 1. artnelIn anoiottR - esus ildmea lnnraeti ottanoir 2. arlentEx ioattoRn - esus ealltar elnaxrte rantioto 3. orntF wRo - Yuo aevh yuo nahd pu in ntofr fo oyu dna hitw yrou rma ddtnexee llup abck the nabd . .4 edSi Row - rou'eY desi to het badn hitw yuor nhda nifcag hte ,hpi lupl ndow odrawt ouyr doy.b (DOICDTNAU)


arcanumm  I got this wrong too, but I think the exercise of internal rotation makes sense because it will isolate the muscle (without assistance by teres minor for adduction). +5  
tiredofstudying  The subscapularis assists in medial (internal) rotation and adduction, but the teres minor also assists in adduction, so the best choice to isolate the subscapularis would be internal (medial) rotation. Choice E +2  
thotcandy  @tiredofstudying teres major also internally rotates so it wouldn't really be isolated either. I guess Tmajor isn't relevant cuz it's not a SITS muscle? Still a stupid question. +1  

submitted by nicsar(1),

a)abduction: supraspinatus-deltoid-triceps-serratus anterior

b)adduction: subscapularis-pectoralis major-lattisimus dorsi- teres major

c)extension=horizontal abduction; post. deltoid, infraspinatus, teres minor

d)internal rotation: subscapularis

for isolated work out, d is better.


thotcandy  teres major also internally rotates? It's attached to the medial lip of the humerus +3  
neovanilla  teres minor externally rotates (+ad-duction) +  

submitted by syoung07(30),

SITS: supraspinatus- ABduction Infraspinatus- Ext rotation Teres minor- Ext rotation Subscapularis- Int rotation.

submitted by fenestrated(29),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

thaW stup nrlineta nittoroa rveo idnoatdcu? uaprsiSbulacs slumce oesd ohbt

smc213  probably because the subscapularis m. is the only SITS muscle that does internal rotation & adduction along with the teres minor m. action being adduction & external rotation. +1  

submitted by abhishek021196(61),

Shoulder muscles that form the rotator cuff: Supraspinatus (suprascapular nerve)— abducts arm initially (before the action of the deltoid); most common rotator cuff injury (trauma or degeneration and impingement; tendinopathy or tear [arrow in A ]), assessed by “empty/full can” test

Infraspinatus (suprascapular nerve)—externally rotates arm; pitching injury

teres minor (axillary nerve)—adducts and externally rotates arm

Subscapularis (upper and lower subscapular nerves)—internally rotates and adducts arm