Anatomy & Physiology: Muscles—Quadratus Plantae.
Structure.
- Origin: calcaneus.
- Insertion: tendon of flexor digitorum longus.
Function.
- Concentric action: helps flexor digitorum longus to flex toes II-V at interphalangeal and metatarsophalangeal joints.
- Reverse mover action: flexion of metarsals at MTP, and flexion of proximal phalanges at PIP and DIP.
- Eccentric action: controls/restrains/decelerates extension at MTP, PIP, and DIP.
- Isometric action: stabilizes MTP, PIP, and DIP.
- Innervation: lateral plantar nerve.
- Arterial supply: medial and lateral plantar arteries.
Clinical Significance.
More.
- https://www.anatomynext.com/quadratus-plantae/
- https://www.youtube.com/watch?v=wVzVS7YRx7I
- https://www.youtube.com/watch?v=WBTsXyz8n7M
- https://www.youtube.com/watch?v=ep9QIn2eZtk
Quadratus plantae. 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.
