Semimembranosus muscle (3D)

This tutorial explores the semimembranosus muscle, part of the hamstrings in the thigh's posterior compartment. It covers the muscle's innervation by the tibial nerve, its origin at the ischial tuberosity, and insertion at the medial tibial condyle. The video details the muscle's actions, including thigh extension at the hip joint and leg flexion and internal rotation at the knee joint. The semimembranosus works in conjunction with other hamstring muscles to facilitate these movements, acting as an antagonist to the quadriceps femoris. The tutorial concludes with a recap of these functions.

What is the origin of the semimembranosus muscle?

Describe the actions of the semimembranosus muscle at the hip joint.

Explain how the semimembranosus muscle works in synergy with other hamstring muscles.

How does the semimembranosus muscle contribute to knee joint movements?

What role does the semimembranosus muscle play in internal rotation of the knee?