Which joint does the popliteus muscle primarily cross?

The popliteus muscle primarily crosses the knee joint and plays a crucial role in its function. This small but important muscle is situated at the back of the knee and is key for initiating knee flexion and stabilizing the knee during movement.

The popliteus helps unlock the knee from the extended position by rotating the femur laterally on the tibia. As the muscle contracts, it allows for a smooth transition from standing straight to bending the knee, which is particularly significant in activities such as running or walking. Its anatomical position and primary action make it essential to the mechanics of the knee joint.

While the popliteus is anatomically connected to the surrounding structures, its dominant role and the significant actions it performs are centered around the knee.