Popliteus muscle
From Wikipedia, the free encyclopedia
| Popliteus muscle | ||
|---|---|---|
| Muscles of the back of the leg. Deep layer. (Popliteus visible at center top.) | ||
| Latin | musculus popliteus | |
| Gray's | subject #129 484 | |
| Origin: | middle facet of the lateral surface of the lateral femoral condyle | |
| Insertion: | posterior tibia under the tibial condyles | |
| Blood: | popliteal artery | |
| Nerve: | tibial nerve | |
| Action: | rotates femur the tibia | |
| Dorlands/Elsevier | m_22/12550232 | |
The popliteus muscle in the leg is used to unlock the knee by laterally rotating the femur on the tibia during a closed chain movement (such as one with the foot in contact with the ground).
It originates from the middle facet of the lateral surface of the lateral femoral condyle and inserts onto the posterior tibia under the tibial condyles, with its tendon running into the knee capsule to the posterior lateral meniscus.
Nerve supply is via the tibial nerve from spinal roots L5 and S1.
[edit] Variations
Additional head from the sesamoid bone in the outer head of the Gastrocnemius.
Popliteus minor, rare, origin from femur on the inner side of the Plantaris, insertion into the posterior ligament of the knee-joint.
Peroneotibialis, 14 per cent., origin inner side of the head of the fibula, insertion into the upper end of the oblique line of the tibia, it lies beneath the Popliteus.
[edit] External links
- LUC pop
- GPnotebook 93978702
- SUNY Labs 15:st-0413
- Dictionary at eMedicine popliteus+%28muscle%29
- PTCentral
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
