What condition involves the compression of the long thoracic nerve, leading to weakness in the serratus anterior muscle and a characteristic "winged scapula" appearance____________________?
Correct answer: C. Scapular dyskinesis
- A. Rotator cuff tear
- B. Frozen shoulder
- C. Scapular dyskinesis
- D. Thoracic outlet syndrome
Explanation
Weakness of the serratus anterior from long thoracic nerve involvement disrupts scapular control and produces winging, a form of scapular dyskinesis. A rotator cuff tear and frozen shoulder do not characteristically cause a winged scapula.
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