Arthroscopic view of the right human knee in about 45 degrees of flexion during an arthroscopic examination by an orthopaedic surgeon at a day-surgery center. The anterior cruciate ligament (ACL) consists of two major fibre bundles, namely the anteromedial (to the right) and posterolateral (to the left) bundles. When the knee is extended, the posterolateral bundle (PL) is tight and the anteromedial (AM) bundle is moderately lax. As the knee is flexed, the AM bundle tightens and the PL bundle relaxes. The AM bundle is the primary restraint against anterior tibial translation, whereas the PM bundle tends to stabilize the knee near full extension, and particularly against rotatory loads. Injury (tear or rupture) of the ACL is a common injury, especially in sports with rapid pivoting movements such as European team handball and soccer. A torn ACL may lead to giving-way episodes. To regain the ability to do sporting activities, an ACL reconstruction procedure is often warranted (using a graft secured close to the anatomic origins of the native ACL). The image was captured with a 30 degrees 4mm arthroscope placed in the intercondylar space through the patellar tendon (called the Swedish portal). Text (labels) has been added onto the image to facilitate the use by a designer that may not be a medical scholar. A copy of the same image without the text has been included in the same series.
Picture of Arthroscopic view of the normal looking anterior cruciate ligament (ACL) of the right knee of an adult human male Royalty-Free
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