Tuberosity of the tibia of the large structure that acts as a lever to extend the knee-joint and prevents the knee from collapsing when the foot strikes the ground. The two ligaments, the patella, and the tibial tuberosity are all superficial, easily palpable structures. Tibial tuberosity fractures are infrequent fractures, most common in adolescents. In running and jumping movements, extreme contraction of the knee extensors can result in avulsion fractures of the tuberosity apophysis. A cast is all that is required if the fragment is not displaced from its normal position on the tibia. However, if the fracture fragment is displaced, then surgery is
Stifle joint the joint into two functional units—the 'femoromeniscal joint' for flexion/extension movements and the 'meniscotibial joint' for rotation—a function analogous to that of the disc dividing the temporomandibular (jaw) joint. The menisci also contain nerve endings which are used to assist in proprioreception. The menisci are attached via a variety of ligaments: two meniscotibial ligaments for each meniscus, the meniscofemoral from the lateral meniscus to the femur, the meniscocollateral from the medial meniscus to the medial collateral ligament, and the transverse ligament (or intermeniscal) which runs between the two menisci. There are between one and four sesamoid bones associated with the