Semimembranosus

Written by Dr Sheila Strover on March 14, 2025

The semimembranosus muscle is one of the three hamstrings muscles of the upper leg. Page updated July 2024 by Dr Sheila Strover (Clinical Editor)

semimembranosusThe semimembranosus reaches from the pelvis to the tibia.

What does the semimembranosus muscle do?

The semimembranosus helps with flexing the knee and also rotating it.

It functions in co-operation with the other two hamstrings muscles.

Peer-reviewed papers
  • Quote from peer-reviewed paper:

    "....Due to the characteristics of the 3 hamstring muscles, the [semimembranosus] is the least flexible and therefore has greater difficulty in adapting to a lengthening stretch mechanism....injuries are the most common in hyperstretching activities, especially with a slow stretch mechanism...."

    Citation: Balius R, Bossy M, Pedret C, Capdevila L, Alomar X, Heiderscheit B, Rodas G. Semimembranosus Muscle Injuries In Sport. A Practical MRI use for Prognosis. Sports Med Int Open. 2017 Jun 14;1(3):E94-E100. German. doi: 10.1055/s-0043-111587. PMID: 30539092; PMCID: PMC6226085.

End of papers Quick links

Semimembranosus tendinopathy

Semimembranosus tendinitis or tendinopathy is a poorly-recognised condition causing pain in the back of the knee.

Peer-reviewed papers End of papers

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