Where Is the Semimembranosus?
The Semimembranosusone is one of the hamstring muscles located from the top of the leg to the inner leg below the knee.
What are the Symptoms of a Semimembranosus Tear?
All of the hamstrings originate on the pelvis and insert onto the back of the lower leg bones. They cross both the hip joint and the knee joint, serving as extensors of the hip and flexors of the knee.
The hamstrings are the most commonly injured muscles in the human body.
Hamstring tears to heal slowly and often reoccur.
What is The Function of the Semimembranosus?
Extends the thigh, flexes the leg
Origin and Insertion of Semimembranosus
Origin:
The semimembranosus arises from the posterolateral aspect of the ischial tuberosity, in front of the origin of the biceps femoris and semitendinosus.
Upper outer surface of the ischial tuberosity.
Insertion:
Medial condyle of the tibia. The semimembranosus tendon attaches to the posteromedial tibia in the posterior aspect of the tibial epiphysis. The semitendinosus also inserts to the anteromedial aspect of the proximal tibia, joining the gracilis and sartorius which insert as the pes anserine complex.
The 3 hamstring muscles are the semimembranosis, semitendinosis, and the biceps femoris. (With the exception of the short head of the biceps femoris)
