This structure known as the anterolateral ligament (ALL).

This study helped to identify the anterolateral ligament (ALL) as a distinct ligamentous structure at the anterolateral aspect of the human knee. Before this moment there were only reports and information on its anatomy and function were vague. This structure was first described by a man in 1897 named Paul Segond. He described it as being pearl in color and resistant. This study showed that in all 40 cadaver dissections, “the ALL was found to originate proximal and posterior to the popliteus tendon insertion, on the lateral femoral epicondyle.”(J. Anat. (2013) Although, this interestingly disagrees with Vincent et al’s (2012) schematic diagram for the ALL. In the study conducted by Vincent et al, they described the ALL as being located on the lateral femoral condyle. Its location of insertion being found anterior to the popliteus tendon insertion, and blending together its fibers. This study is very important for building the first anatomical description of the ALL. The knowledge provided within the study may later prove to be very relevant for clinical practice.It was also hypothesized that the ALL functions as a stabilizer for internal rotation. This is based off the location of the ALL along the anterolateral edge of the knee. Their findings confirmed Segond’s description, where he explains, “extreme amounts of tension during forced internal rotation”.(Segond, 1879).  But, throughout their observations of the ALL they found the ALL to become tense during forced internal rotation, ranging between 30° to 90° of flexion of the knee. Although this hypothesis would require further analysis but may prove to be very important in discovering the role for the ALL in rotatory knee instability patterns present in many ACL- deficient knees.I found this article to be very interesting. I like that they provided detailed pictures, while also labeling the structures. Prior to reading this study I wasn’t aware of the distinct ligamentous structure known as the anterolateral ligament (ALL). I find it interesting that this is the first study to describe this. Looking back on previous studies, I would have thought that some kind of record would have been taken on its anatomy earlier. I am interested in further studies including the anterolateral ligament.

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