Popliteus
Popliteus
Popliteus (/pɒplɪˈtiːəs/; from Latin poples meaning 'back of the knee') is a small muscle located at the back of the knee joint. It is triangular in shape and is considered part of the superficial layer of the posterior compartment of the leg.
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 its primary function is to unlock the knee joint by laterally rotating the femur on the fixed tibia when the foot is on the ground.
Clinical significance
Injury to the popliteus muscle or tendon can result in popliteus tendonitis, a condition characterized by pain at the back of the knee. This condition is commonly seen in runners and cyclists. Treatment typically involves rest, physical therapy, and in some cases, surgery.
Related terms
- Popliteal artery: The main blood supply to the knee joint and the lower leg.
- Popliteal vein: The main vein draining blood from the knee joint and the lower leg.
- Popliteal fossa: The shallow depression located at the back of the knee joint.
Etymology
The term "popliteus" is derived from the Latin poples, which means 'back of the knee'. It is a diminutive form of the word, indicating a small muscle located in this area.
External links
- Medical encyclopedia article on Popliteus
- Wikipedia's article - Popliteus
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