- Popliteus muscle
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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 posterior-medial tibia under the tibial condyles Insertion middle facet of the lateral surface of the lateral femoral condyle Artery popliteal artery Nerve tibial nerve Actions Lateral rotation of femur and flexion of knee The popliteus muscle in the leg is used to unlock the knee during walking/running by laterally rotating the femur on the tibia (or medially rotating the tibia) during a closed chain movement (such as one with the foot in contact with the ground).
Contents
Origin and insertion
It originates from lateral surface of lateral condyle of femur, origin is intracapsular outer margin of lateral meniscus of knee joint. Insertion-posterior surface of shaft of tibia above soleal line.
Innervation
Nerve supply is via the tibial nerve from spinal roots L5 and S1.
Action
The Popliteus assists in flexing the leg upon the thigh; when the leg is flexed, it will rotate the tibia inward.
It is especially called into action at the beginning of the act of bending the knee, in as much as it produces the slight inward rotation of the tibia, which is essential in the early stage of this movement.
When the knee is in full extension; the femur slightly medially rotates on the tibia to lock the knee joint in place. Popliteus is often referred to as the "Key" to unlocking the knee since it begins knee flexion by laterally rotating the femur on the tibia.Popliteus is also attached to the lateral meniscus in the knee; and draws it posteriorly during knee flexion to prevent crushing the meniscus between the tibia/femur as the knee flexes.
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% of population. Origin is 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[1].
Trigger points
A popliteus shortened by trigger points can cause pain near its tendinous origin at the lateral knee.
Additional images
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Right femur. Posterior surface.
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Bones of the right leg. Posterior surface.
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Capsule of right knee-joint (distended). Posterior aspect.
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The popliteal, posterior tibial, and peroneal arteries.
See Also
- Posterolateral Knee
References
External links
- LUC pop
- 93978702 at GPnotebook
- SUNY Labs 15:st-0413
- popliteus+%28muscle%29 at eMedicine Dictionary
- 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 within it may be outdated.
List of muscles of lower limbs (TA A04.7, GA 4.465) ILIAC Region
/ ILIOPSOASBUTTOCKS THIGH /
compartmentsLEG/
Crus/
compartmentssuperficial · triceps surae (gastrocnemius, soleus, accessory soleus, Achilles tendon) · plantaris
deep · tarsal tunnel (flexor hallucis longus, flexor digitorum longus, tibialis posterior) · popliteusfibularis muscles (longus, brevis)FOOT DorsalPlantar1st layer (abductor hallucis, flexor digitorum brevis, abductor digiti minimi) · 2nd layer (quadratus plantae, lumbrical muscle) · 3rd layer (flexor hallucis brevis, adductor hallucis, flexor digiti minimi brevis) · 4th layer (dorsal interossei, plantar interossei)Categories:- Muscle stubs
- Calf muscles
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См. также в других словарях:
Popliteus — Musculus popliteus Wadenmuskulatur des Menschen Ursprung Condylus lateralis femoris (äußerer Gelenkkopf des Femurs) Ansatz Obere hintere Fläche der Tibia … Deutsch Wikipedia
Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… … Medical dictionary
Muscle — For other uses of Muscle , see Muscle (disambiguation). A top down view of skeletal muscle Muscle (from Latin … Wikipedia
popliteus — 1. SYN: popliteal. 2. SYN: popliteal fossa. 3. SYN: p. (muscle). [L.] * * * pop·li·te·us .päp lə tē əsalso päp lit ē əs n, pl li·tei .ī a flat muscle that originates from the lateral condyle of the femur, forms part of the floor of the popliteal… … Medical dictionary
popliteus — /pop lit ee euhs, pop li tee /, n., pl. poplitei / lit ee uy , li tee uy/. Anat. a thin, flat, triangular muscle in back of the knee, the action of which assists in bending the knee and in rotating the leg toward the body. [1695 1705; < NL, equiv … Universalium
popliteus — noun A small muscle at the back of the knee that aids in bending the knee and in the rotation of the lower leg … Wiktionary
popliteus — n. muscle located in the back of the knee (Anatomy) … English contemporary dictionary
popliteus — n. a flat triangular muscle at the back of the knee joint, between the femur and tibia, that helps to flex the knee. Derivatives: popliteal adj … The new mediacal dictionary
popliteus — pop•lit•e•us [[t]pɒpˈlɪt i əs, ˌpɒp lɪˈti [/t]] n. pl. lit•e•i [[t] ˈlɪt iˌaɪ, lɪˈti aɪ[/t]] anat. a flat, triangular muscle at the back of the knee • Etymology: 1695–1705; < NL, = L poplit (s. of poples) knee joint, back of the knee + eus… … From formal English to slang
popliteal muscle — popliteus muscle musculus popliteus … Medical dictionary
