What is semimembranosus?
Semimembranosus Muscle Introduction The semimembranosus is one of the three hamstring muscles located in the posterior compartment of the thigh. It plays an essential role in movements of the hip and knee, contributing to walking, running, and maintaining posture. Its name comes from its partly membranous tendon of origin. Clinically, this muscle is important for physiotherapists, orthopedists, and sports medicine specialists because of its role in lower limb injuries and rehabilitation. Anatomy Origin The semimembranosus muscle originates from the superolateral impression of the ischial tuberosity of the pelvis. Insertion It inserts mainly into the posterior aspect of the medial condyle of the tibia . Some fibers also contribute to the oblique popliteal ligament of the knee. Nerve Supply It is innervated by the tibial division of the sciatic nerve (L5, S1, S2). Blood Supply Blood supply is provided by branches of the profunda femoris artery and the popliteal artery . ...