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You observe a physician perform a muscle test by having the patient abduct her arm 90 degrees and move the arm forward against resistance. what muscle (or part of a muscle) is the physician testing
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You observe a physician perform a muscle test by having the patient abduct her arm 90 degrees and move the arm forward against resistance. what muscle (or part of a muscle) is the physician testing

User Jagoly
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That would be your subscapularis, which appears to be a large triangular muscle connecting the humerus and the front of the capsule of the shoulder-joint.
User Whymatter
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