A 17-year-old man is evaluated in the office due to right shoulder pain. He suffered an injury in a basketball game last week. He fell strongly on the posterior side of his right shoulder. He started having severe pain in the right shoulder. The pain has persisted and did not respond to any medication. Physical examination shows bruising on the posterior side of the right shoulder. External rotation of the right arm with resistance induces severe pain. Which of the following muscles is most likely injured?

Question

Quizplus · Accepted Answer

Eductional Objective: The muscles supraspinatus, infraspinatus, teres minor and the subscapularis form the rotator cuff muscles, which act to stabilize and move the shoulder. Pain associated with external rotation of the arm indicates infraspinatus muscle injury.

A 17-Year-Old Man Is Evaluated in the Office Due to Right