Semitendinosus - Muscle Physiology & Functional Anatomy

 

Semitendinosus Muscle

Anatomy

 

Origin:

  • Upper inner quadrant of posterior surface of ischial tuberosity & part of the sacrotuberous ligament

Insertion:

  • Proximal aspect of the medial tibial condyle (pes anserine)



Major Arteries:

  • Inferior gluteal artery

  • Perforating arteries

 

Neural Innervation:

  • Tibial portion of sciatic nerve (L5, S1)

 

Trigger Points:

Hamstrings Trigger Points

 

Physiology

 

Concentric Functions:

  • Knee flexion & internal rotation of the tibia

  • Hip extension

 

Eccentric Functions:

  • Decelerates knee extension, hip flexion & tibial external rotation

  • Assists to decelerate anterior pelvic rotation

 

Isometric Function:

  • Helps dynamically stabilize the lumbo-pelvic-hip complex during functional movements

 

Related Muscles


Antagonist:

Exercises:

 

 


More Images of the Semitendinosus Muscle

Semitendinosus Heads

Cross Section of Semitendinosus muscle

 

 


More Information about the Semitendinosus Muscle

The semitendinosus muscle is one of the three hamstrings along with the biceps femoris and semimembranosus  The long head is biarticulate meaning it is involved in movement of 2 joints which are the hip & the knee in the case of the semitendinosus muscle.

 

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