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This dog's stifle joint is labeled 12. The stifle joint (often simply stifle) is a complex joint in the hind limbs of quadruped mammals such as the sheep, horse or dog. It is the equivalent of the human knee and is often the largest synovial joint in the animal's body. The stifle joint joins three bones: the femur, patella, and tibia.
The animal can periodically shift its weight to rest a different leg, and thus all limbs are able to be individually rested, reducing overall wear and tear. The relatively slim legs of certain large mammals, such as horses and cows, would be subject to dangerous levels of fatigue if not for the stay apparatus.
Proximally it forms a ball-and-socket joint with the pelvis to form the hip joint, and distally it meets the tibia and patella at the stifle joint. It serves as an attachment point for the deep and middle gluteal muscles, and the accessory and round ligaments. Patella; Tibia: runs from stifle to hock. The proximal end provides attachment for ...
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The stifle joint relies solely upon soft tissue structures for its integrity; thus it differs from an elbow or a hip joint that have a lot of parallel joint surfaces and an interlocking structure to the joints that give them inherent stability and an almost vacuum effect that keeps the joint surfaces together.
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Cruciate ligaments occur in the knee of humans and other bipedal animals and the corresponding stifle of quadrupedal animals, and in the neck, fingers, and foot. The cruciate ligaments of the knee are the anterior cruciate ligament (ACL) and the posterior cruciate ligament (PCL). These ligaments are two strong, rounded bands that extend from ...