These authors compared the active motion in 100 patients with different sizes and locations of chronic rotator cuff tears.
They defined pseudoparalysis as the inability to actively elevate the arm above 90 degrees in the presence of normal passive range of motion. Pseudoparalysis was found in 80% of the cases with supraspinatus and complete subscapularis tears, in 45% of the cases with tears involving the supraspinatus, infraspinatus, and superior subscapularis, and in 33% of the cases with tears involving the supraspinatus, infraspinatus, and teres minor. There was no difference in the amount of pain reported by patients in the different groups.
An important aspect of this work is that it points out the importance of the subscapularis integrity in enabling active elevation.
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