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Muscles: Gastrocnemius.

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Anatomy & Physiology: Muscles—Gastrocnemius.

Structure.

  • Origin: posterior aspect of the lateral and medial femoral condyles.
  • Insertion: calcaneus via the Achilles tendon.

Function.

  • Concentric action: accelerates plantar flexion.
  • Reverse mover action: plantarflexion, inversion/supination of the talus at subtalar joint.
  • Eccentric action: decelerates ankle dorsiflexion.
  • Isometric action: stabilization of foot and ankle.
  • Innervation: tibial nerve.
  • Arterial supply: sural branches of popliteal artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.