Final answer:
The tibiocalcaneal part of the medial collateral ligament appears to be misreferenced; the medial collateral ligament is an extrinsic knee ligament that stabilizes the medial tibiofemoral joint and prevents hyperextension and rotation of the knee.
Step-by-step explanation:
The tibiocalcaneal part of the medial collateral ligament is not a standard anatomical term. However, the medial collateral ligament (MCL), also known as the tibial collateral ligament, is an extrinsic ligament of the knee joint that spans from the medial epicondyle of the femur to the medial tibia. It resists hyperextension and rotation of the extended knee. The MCL is integral to the stability of the medial tibiofemoral joint, which consists of the articulation between the medial condyle of the tibia and the medial condyle of the femur, allowing for flexion and extension at the knee.