Abnormal ankle physiology Positive talar tilt test 2025-08-31T20:35:02Z Post-traumatic laxity is defined as excessive joint range of motion beyond normal physiologic range of motion. An abnormal result of the talar tilt test. This test assesses ankle ligament integrity, particularly the calcaneofibular ligament (CFL) and the deltoid ligaments. To perform the test, the foot is placed at an angle of 90 degrees with the leg, the calcaneofibular ligament is perpendicular and the anterior talofibular ligament is parallel to the long axis of the talus. Therefore, inversion in this position results in strain on the calcaneofibular ligament.