Fig. 1

This figure expresses two diagrams that demonstrate the lever sign test, which is used to diagnose ACL ruptures. The test involves placing a fist under the patient's calf and applying pressure to their quadriceps with a second hand. A shows a positive Lever Sign test. The physician applies the pressure to the quadriceps with one hand, while the other hand serves as the fulcrum. In this case, the ACL has been ruptured and is unable to counteract the force of gravity. As a result, the foot remains on the examination table despite the pressure being applied. B shows a negative lever sign test. Like in A, pressure is applied to the quadriceps with the second hand. However, in this case, the ACL is intact and is able to counteract the force of gravity. Therefore, the ACL is able to counteract the downward force and keep the foot raised