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MBBS QUESTION #10176
Question 1
A patient with a fracture of the surgical neck of the humerus cannot abduct the arm beyond about 15 degrees and has sensory loss over the 'regimental badge' area of the shoulder. Which nerve is injured?
  • Axillary nerve✔️
  • Musculocutaneous nerve
  • Radial nerve
  • Suprascapular nerve
Correct Answer Explanation
The axillary nerve winds around the surgical neck of the humerus with the posterior circumflex humeral artery, supplying deltoid and teres minor and the skin over the lower deltoid ('regimental badge' area); it is characteristically injured in surgical neck fractures and anterior shoulder dislocation.