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The Hamstring Muscles

 

 

Treating Trigger Points in Short Head Biceps Femoris - Stuart Hinds

 

 

During running, the hamstrings slow down the leg at the end of its forward swing and prevents the trunk from flexing at the hip joint 

 

The hamstrings consist of three muscles. From medial to lateral they are the semimembranosus, semitendinosus, and biceps femoris.  

Origin

Ischial tuberosity (sitting bone). Biceps femoris also originates from back of femur.

Insertion

Semimembranosus: back of medial condyle of tibia (upper side part of tibia).
Semitendinosus: upper medial surface of shaft of tibia. Biceps femoris: lateral side of head of bula. Lateral condyle of tibia.

 

Action

Flex knee joint. Extend hip joint. Semimembranosus and semitendinosus also medially rotate (turn in) lower leg when knee is flexed. 
Biceps femoris laterally rotates (turns out) lower leg when knee is flexed.

Antagonists: quadriceps.

Nerve

Branches of sciatic nerve, L4, 5, S1, 2, 3.

Basic Functional Movement

During running, the hamstrings slow down the leg at the end of its forward swing and prevents the trunk from flexing at the hip joint.

 

 

The Biceps Femoris in More Detail 

 

 

Trigger Point Referred Pain Patterns

Semimembranosus and semitendinosus: strong 10 cm zone of pain, inferior gluteal fold, with diffuse pain posteromedial legs to Achilles tendon area.  

Biceps femoris: diffuse pain posteromedial legs, with strong 10 cm zone posterior to knee joint. 

 

 

 

Hamstrings - Referred Pain Patterns

  

 

   

  

 

 

 

  

 

This trigger point therapy blog is intended to be used for information purposes only and is not intended to be used for medical diagnosis or treatment or to substitute for a medical diagnosis and/or treatment rendered or prescribed by a physician or competent healthcare professional. This information is designed as educational material, but should not be taken as a recommendation for treatment of any particular person or patient. Always consult your physician if you think you need treatment or if you feel unwell. 

 

  

   

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