Home > Anatomy & Physiology > Muscles > Semimembranosus

Semimembranosus

Semimembranosus is the most medial of the three hamstring muscles.

Origin

• Ischial tuberosity

Insertion

• Posterior part of the medial condyle of the tibia

Actions

• Hip extension
• Knee flexion
• Internal rotation of the hip when the knee is flexed

Innervation

• Tibial part of the sciatic nerve

Daily uses

• Bending the knee to step over something

How can I stretch it?

• Standing hamstring stretch
• Sitting hamstring stretch

How can I strengthen it?

• Knee curl machine
• Hip extension using body weight
• Hip extension using a resistance band