Anterior Cruciate Ligament (ACL) Injury: The ACL is one of four main ligaments of the knee. The ACL forms a cross shape with the Posterior Cruciate Ligament (hence their ‘cruciform’ labels) connecting the thigh bone to the shin bone.. An ACL injury occurs when the tibia(shin bone) moves forward of the femur (thigh bone) generally … Continue reading Anterior Cruciate Ligament (ACL) Injury