Internal Rotation Lag Sign
What is Internal Rotation Lag Sign?
- Internal Rotation Lag Sign is used to test The integrity of the subscapularis tendon.
How it's Performed?
- The patient is seated with his or her back to the examiner.
- The affected arm is held by the examiner in almost maximal internal rotation.
- The elbow is flexed to 90 degrees, and the shoulder is held at 20 degrees of elevation and 20 degrees of extension.
- The dorsum of the hand is passively lifted away from the lumbar region until almost full internal rotation is reached.
- The patient is asked to maintain this position actively as the examiner releases the wrist while maintaining support at the elbow
What does a positive Internal Rotation Lag Sign mean?
- The Internal Rotation Lag Sign is positive when a lag occurs.
Sensitivity & Specificity
- Sensitivity: 100 %
- Specificity: 84 %