Quadratus Plantae - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The quadratus plantae is an intrinsic muscle of the foot. It is located within the second plantar muscle layer of the foot, and is a square-shaped muscle with two heads of origin. Attachments: Originates from the medial and lateral plantar surface of the calcaneus. It attaches to the tendons of flexor digitorum longus. Actions: Assists the flexor digitorum longus in flexion of the lateral four toes. Innervation: Lateral plantar nerve (branch of the tibial nerve) Blood Supply: Medial and lateral plantar arteries. By TeachMeSeries Ltd (2026) Fig 1The second layer of the plantar muscles. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Frequent questions What is the quadratus plantae muscle? The quadratus plantae is an intrinsic muscle located in the second layer of the plantar muscles of the foot. It has a square shape and consists of two heads of origin. Where does the quadratus plantae muscle originate from? This muscle originates from the medial and lateral plantar surfaces of the calcaneus bone. Its specific attachments allow it to play a role in foot movement. What is the primary function of the quadratus plantae? The main function of the quadratus plantae is to assist the flexor digitorum longus muscle in flexing the lateral four toes. This action is crucial for proper foot function during activities like walking. Which nerve innervates the quadratus plantae? The quadratus plantae is innervated by the lateral plantar nerve, which is a branch of the tibial nerve. This nerve supply is essential for the muscle's movement and function. What is the blood supply of the quadratus plantae? The blood supply to the quadratus plantae comes from the medial and lateral plantar arteries. These arteries ensure that the muscle receives the necessary nutrients and oxygen for its activity. Rate This Article