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2 Αυγ 2023 · Semimembranosus is a relatively large muscle that originates from a small facet on the rough superolateral surface of the ischial tuberosity. The tendon of semimembranosus appears at the level of the mid-thigh and continues caudally toward the point of insertion at the medial condyle of the tibia.
The semimembranosus acts synergistically with the popliteus muscle through the fibrous extension towards this muscle. The distal semimembranosus complex actively pulls the posterior horn of the medial meniscus, protecting it from being crushed between the medial femoral condyle and the posterior medial tibial plateau during knee flexion.
24 Οκτ 2022 · Actions: Flexion of the leg at the knee joint. Extension of thigh at the hip. Medially rotates the thigh at the hip joint and the leg at the knee joint. Innervation: Tibial part of the sciatic nerve. Blood Supply: Profunda femoris artery. Fig 1. The muscles of the posterior thigh. Fig 2.
The semimembranosus muscle (/ ˌsɛmiˌmɛmbrəˈnoʊsəs /) is the most medial of the three hamstring muscles in the thigh. It is so named because it has a flat tendon of origin. It lies posteromedially in the thigh, deep to the semitendinosus muscle. It extends the hip joint and flexes the knee joint.
22 Μαρ 2024 · The semimembranosus muscle, as part of the hamstring group, has several important functions related to movement and stabilization of the lower limb: Hip Extension: The semimembranosus aids in extending the hip joint, which involves moving the thigh backward.
5 Ιουν 2021 · The semimembranosus muscle is one of the hamstring muscles in the posterior compartment of the thigh and accompanies the semitendinosus muscle in the medial aspect of the posterior thigh. It is named for its flattened membranous tendon of its ischial attachment.
Actions & Testing. The semimembranosus muscle is involved in multiple actions: - flexes the leg at the knee joint; - medially rotates the leg at the knee joint while this joint is held in a semiflexed position; - extends the thigh at the hip joint.
