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.
- https://www.anatomynext.com/gastrocnemius/
- https://www.youtube.com/watch?v=9DZvDF9j6rc
- https://www.youtube.com/watch?v=wHkjSYQQing
Gastrocnemius. Used with permission by 3D4Medical.
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.
