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Origin :

  • Posterior aspect of fibular head,
  • Upper 1/4 – 1/3 of posterior surface of fibula,
  • Middle 1/3 of medial border of tibial shaft
  • and from posterior surface of a tendinous arch spanning the two sites of bone origin.

Insertion :

  • Eventually unites with the gastrocnemius aponeurosis to form the Achilles tendon,
  • inserting on the middle 1/3 of the posterior calcaneal surface.

Innervation :

  • Tibial nerve (S1, S2)

Arterial Supply :

  • Posterior tibial, peroneal and sural arteries.

Depth :

  • Superficial


Action :

  • Powerful plantar flexor of ankle.
Target Muscles Target MusclesPowerful plantar flexor of ankle.