<prompt> Lift off test is done to assess the function of -SupraspinatusInfraspinatusTeres minorSubscapularis  <response>: Lift Off Test Gerbers test Lift off test is done to assess the strength of subscapularis muscle and detect a rupture of the subscapularis tendon.Subscapularis functions primarily as an internal rotator of the shoulderThe test is performed with the arm extended and internally rotated such that the dorsum of the hand rests against the lower back.The subscapularis is maximally active in this position.The patient is then instructed to lift hisher hand off the back Lift - off Attempting further internal rotationIf the patient is able to lift the dorsum of the had off the back the subscapularis tendon is intact and the test is considered negative.If the patient is not able to lift the dorsum of the hand off the back the subscapularis tendon is torn and the test is considered positive.The lift-off testis a sensitive and specific test for subscapularis function and this has been validated by electromyography studies. 