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The posterior cruciate ligament (PCL) is a ligament in each knee of humans and various other animals. It works as a counterpart to the anterior cruciate ligament (ACL). It connects the posterior intercondylar area of the tibia to the medial condyle of the femur. This configuration allows the PCL to resist forces pushing the tibia posteriorly ...
The posterior cruciate ligament is located within the knee. Ligaments are sturdy bands of tissues that connect bones. Similar to the anterior cruciate ligament, the PCL connects the femur to the tibia. There are four different grades of classification in which medical doctor's classify a PCL injury: Grade I, the PCL has a slight tear.
Relative to the femur, the ACL keeps the tibia from slipping forward and the PCL keeps the tibia from slipping backward. Another structure of this type in human anatomy is the cruciate ligament of the dens of the atlas vertebra, also called "cruciform ligament of the atlas", a ligament in the neck forming part of the atlanto-axial joint. [2]
Anterior cruciate ligament surgery is a complex operation that requires expertise in the field of orthopedic and sports medicine. Many factors should be considered when discussing surgery, including the athlete's level of competition, age, previous knee injury, other injuries sustained, leg alignment, and graft choice.
Injuries to the PLC often occur in combination with other ligamentous injuries to the knee; most commonly the anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL). [2] As with any injury, an understanding of the anatomy and functional interactions of the posterolateral corner is important to diagnosing and treating the injury.
Double PCL sign: The displaced meniscal fragment mimics the appearance of a second posterior cruciate ligament (PCL) on sagittal images. Flipped meniscus appearance: The displaced fragment creates an abnormal signal within the joint in sagittal view.
The double PCL sign is best observed on sagittal T2-weighted or proton density-weighted MRI images. [5] Key features include: [6] Duplicated PCL Appearance: The native PCL appears as a curvilinear low-signal intensity structure in its typical anatomical location.The displaced meniscal fragment appears as a second parallel low-signal structure inferior to the PCL.
Anterior cruciate ligament (ACL). The ACL has an important role in stabilization of knee extension movement by preventing the knee from hyperextending. Posterior cruciate ligament (PCL) Medial collateral ligament (MCL) Lateral collateral ligament (LCL) Joint capsule or articular capsule (especially posterior knee capsule) Quadriceps femoris muscle