Popliteus muscle

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Popliteus muscle

The Popliteus muscle (pronunciation: /pɒplɪˈtiːəs ˈmʌsəl/) is a small, flat, triangular muscle located in the posterior compartment of the leg. It is part of the musculoskeletal system and plays a crucial role in knee flexion and rotation.

Etymology

The term "Popliteus" is derived from the Latin word "poples," which means "back of the knee." The muscle is named for its location at the back of the knee joint.

Anatomy

The Popliteus muscle originates from the lateral condyle of the femur and the posterior horn of the lateral meniscus. It inserts into the posterior surface of the tibia, above the soleal line. The muscle is innervated by the tibial nerve and is vascularized by the popliteal artery.

Function

The primary function of the Popliteus muscle is to unlock the knee joint at the beginning of knee flexion. It does this by laterally rotating the femur on the tibia. The muscle also acts to stabilize the knee during walking and running.

Related Terms

  • Femur: The thigh bone, which is the longest bone in the human body.
  • Tibia: The shin bone, which is the larger of the two bones in the lower leg.
  • Meniscus: A piece of cartilage that provides a cushion between the femur and tibia.
  • Tibial nerve: A branch of the sciatic nerve that provides innervation to the lower leg and foot.
  • Popliteal artery: The main artery that supplies blood to the knee joint and lower leg.

See Also

External links

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