Flexor Digitorum Brevis - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The flexor digitorum brevis is an intrinsic muscle of the foot. It is located within the first (most superficial) plantar muscle layer of the foot, between the plantar fascia and the tendons of the flexor digitorum longus. Attachments: Originates from the medial tubercle of the calcaneus and the plantar aponeurosis. It attaches to the middle phalanges of the lateral four digits. Actions: Flexion of the lateral four toes at the proximal interphalangeal joints. Innervation: Medial plantar nerve (branch of tibial nerve). Blood Supply: Branches of the anterior and posterior tibial arteries. By TeachMeSeries Ltd (2026) Fig 1The first layer of plantar muscles. The plantar aponeurosis has been cut to reveal the underlying flexor digitorum. 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 flexor digitorum brevis? The flexor digitorum brevis is an intrinsic muscle located in the foot's first plantar muscle layer. It plays a crucial role in the movement of the toes. Where does the flexor digitorum brevis originate? This muscle originates from the medial tubercle of the calcaneus and the plantar aponeurosis. Its position allows it to effectively contribute to toe flexion. What is the primary function of the flexor digitorum brevis? The primary function of the flexor digitorum brevis is to flex the lateral four toes at the proximal interphalangeal joints. This action is essential for activities such as walking and running. Which nerve innervates the flexor digitorum brevis? The flexor digitorum brevis is innervated by the medial plantar nerve, a branch of the tibial nerve. This innervation is critical for muscle contraction and function. What is the blood supply to the flexor digitorum brevis? The blood supply to the flexor digitorum brevis comes from branches of the anterior and posterior tibial arteries. This vascular supply is vital for muscle health and performance. Rate This Article