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Semitendinosus

Contents

Anatomy pictures

Semitendinosus - anterior view
Semitendinosus - posterior view
Semitendinosus - anteromedial view
Semitendinosus - tibial insertion

Referred pain pattern

Semimembranosus and semitendinosus -
painpattern

Muscle Type

  • Postural

Symptoms

  • Pain or limping while walking
  • Pain in buttocks, upper thigh or knee when sitting
  • Sciatica or pseudo-sciatica
  • Inability of complete range of motion in extension of knee
  • 'Growing pains' in children
  • Pelvic distortions and SI-joint dysfunction
  • Tendinitis or bursitis at attachment

Muscular attachments

Videos

Short version

Detailed version

Alternative short version

Alternative detailed version

Important functions

  • Gives support to the sacroiliac joint by giving a stabilizing influence via the sacrotuberous ligament

NOTES OF CLINICAL IMPORTANCE

  • Releasing or relaxing a tense Hamstrings might put an unstable sacroiliac joint at risk by removing the hamstrings' protective influence (the Hamstrings stabilizes the SIJ joint)
  • The 4 major muscles that creates the stability for the SIJ joint is the Erector Spinae, Biceps Femoris, Latissimus dorsi and Gluteus Maximus

Myofascial lines

Dorsal line:

Anatomy

Position

  • Superficial

Origin

  • Tuberositas ischiadicum

Insertion

  • Pes anserinus
  • Proximal and anteromedial surface of tibia
  • Deep fascia of the leg

Main function

  • Knee
    • Flexion
  • Hip
    • Extension
  • Pelvis
    • Posterior tilt

Secondary function

  • Knee
    • Medial rotation
  • Hip
    • Medial rotation

Nerve innervation

  • Segmental
    • L5-S2
  • Peripheral
    • Nervus sciaticus

Arterial supply

  • Inferior gluteal artery
  • Deep part of the femoral artery
  • Popliteal artery