MSK MRI

The major attachments of the posterior horn of the lateral meniscus are the popliteomeniscal fascicles and the meniscofemoral ligaments. This posteroblique illustration shows the relationship of meniscofemoral ligaments, lateral meniscus, and PCL. The meniscofemoral ligaments originate from the posterior horn of the lateral meniscus and insert onto the lateral aspect of the posterior medial femo..

•This figure illustrates the relationship of meniscofemoral ligaments, lateral meniscus, and PCL. The meniscofemoral ligaments originate from the posterior horn of the lateral meniscus and insert onto the lateral aspect of the posterior medial femoral condyle, with the Humphry ligament anterior to the posterior cruciate ligament (PCL) and the Wrisberg ligament posteriorly Occasionally the menisc..

The popliteomeniscal fascicles consist of the anteroinferior(strongest), posterosuperior, and posteroinferior. posteroinferior The posteroinferior popliteomeniscal fascicle (arrow) is the least consistently visualized of the fascicles The posteroinferior fascicle is more medially located, and extends from a medial aponeurotic extension of the popliteus tendon to attach to the lateral meniscus ne..

The popliteomeniscal fascicles arise from the periphery of the posterior horn of the lateral meniscus and form a posterolateral meniscocapsular extension, which creates the popliteus hiatus. The popliteal hiatus shows relatively symmetric posterosuperior and anteroinferior fascicles. More medial section of the hiatus shows the normal deficiency of the anteroinferior popliteomeniscal fascicle. le..

The anteroinferior popliteomeniscal fascicle (yellow arrow) is seen to course from the inferior aspect of the lateral meniscus posteroinferiorly to blend with fibers of the popliteofibular ligament This fascicle is typically seen on sagittal slices where the fibular head is also visible. In another patient, a component of the anteroinferior popliteomeniscal fascicle which courses directly to the..

The posterosuperior popliteomeniscal fascicle forms the roof of the popliteus hiatus, extending from the posterosuperior margin of the lateral meniscus to the posterior capsule. The anteroinferior popliteomeniscal fascicle is a coronary ligament, which forms the floor of the popliteus hiatus. As the popliteus tendon passes laterally, it passes beneath the posterosuperior fascicle and above the a..

The LM has a loose attachment to the joint capsule and to the femur and tibia by means of the meniscal ligaments and is not anchored to the lateral collateral ligament (LCL). Posterior oblique drawing demonstrates posterolateral restraints of the lateral meniscus including the posterosuperior popliteomeniscal fascicle (PSF), anteroinferior popliteomeniscal fascicle (AIF), meniscofemoral ligament..

PRLM has two attachment sites of the intertubercular region and the posterior slope of the lateral tubercle. Contiguous fat-suppressed PD coronal images with a posteroanterior direction demonstrate small, dark signal foci (white arrows) traversing the intertubercular crest and terminating on the medial tubercle, near the tibial attachment of the ACL. These green-yellow arrows show an intercondyl..

PRLM has two attachment sites of intertubercular region and posterior slope of lateral tubercle. This image shows an intercondylar crest insertion component among the two attachment sites. The PRLM inserts mainly in the intertubercular area. It is delineated on MRI as a dark signal line parallel to the tibial plateau on mid-sagittal images with an oblique course and longer length than other root..

The PRLM(lateral meniscus posterior root) provides secondary stability to the anterior cruciate ligament during pivot shift loading. The PRLM has unique features, including its course and configuration. An accurate anatomic understanding of the PRLM is clinically important because this region is difficult to fully visualize arthroscopically. PRLM has two attachment sites of intertubercular regio..