After Falling from a Jungle Gym, a 3-Year-Old Boy Is

After falling from a jungle gym, a 3-year-old boy is taken to the emergency room. The child landed on his outstretched arms after attempting to catch himself. He did not pass out and has been weeping uncontrollably since he collapsed. The pulse rate is 140 beats per minute, and all other vital indicators are within normal ranges. Physical examination indicates soreness and swelling across the anterior region of his right shoulder, as well as crepitus. Below is an x-ray of his right shoulder. Tension from which of the following muscles is most likely responsible for displacement of the distal bone fragment?

A) Biceps
B) Deltoid
C) Levator scapulae
D) Pectoralis minor
E) Teres minor

Correct Answer:

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