Semimembranosus muscle

The Semimembranosus muscle (/ˌsɛmiˌmɛmbrəˈnoʊsəs/; from Latin, semi meaning "half" and membranosus meaning "membranous") is one of the three hamstring muscles that are located at the back of the thigh. The other two are the semitendinosus muscle and the biceps femoris muscle.

Anatomy

The semimembranosus muscle originates from the ischial tuberosity, the sit bone. It extends down the back of the thigh to the medial condyle of the tibia, one of the bones in the lower leg. This muscle is responsible for extending the hip joint and flexing the knee joint. It also helps in medially rotating the knee.

Function

The semimembranosus muscle, along with the other hamstring muscles, plays a crucial role in numerous activities such as walking, running, and jumping. It allows for the flexion of the knee and extension of the hip, which are necessary movements in these activities.

Clinical significance

Injury to the semimembranosus muscle, like other hamstring injuries, is common among athletes, especially those involved in sports that require a lot of running and jumping. Such injuries can result in a pulled hamstring, characterized by sudden and severe pain in the back of the thigh.

References

External links

Medical encyclopedia article on Semimembranosus muscle
Wikipedia's article - Semimembranosus muscle

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Semimembranosus muscle