Plantaris - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The plantaris is a small muscle within the superficial compartment of the posterior leg. It is absent in approximately 10% of the population. Attachments: Originates from the lateral supracondylar line of the femur. The fibres condense into a tendon which travels down the leg, between the gastrocnemius and soleus muscles. It blends with the calcaneal tendon and inserts onto the calcaneus. Actions: Contributes to plantarflexion at the ankle joint and flexion at the knee joint. Innervation: Tibial nerve. Blood supply: Lateral sural artery (branch of the popliteal artery). By TeachMeSeries Ltd (2026) Fig 1The muscles in the superficial layer of the posterior leg. The body of the gastrocnemius has been cut away to expose the underlying musculature. 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 Pro Feature - Dissection Atlas Prosection of the posterior leg with the proximal aspect of the gastrocnemius removed the demonstrate the underlying structures. Prosection of the posterior leg with the proximal aspect of the gastrocnemius removed the demonstrate the underlying structures. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the plantaris muscle? The plantaris is a small muscle located in the superficial compartment of the posterior leg, known for its role in ankle and knee movement. It is notable for being absent in about 10% of individuals. What are the attachments of the plantaris muscle? The plantaris muscle originates from the lateral supracondylar line of the femur and its tendon runs between the gastrocnemius and soleus muscles. It ultimately blends with the calcaneal tendon and inserts onto the calcaneus. What actions does the plantaris muscle perform? The plantaris contributes to plantarflexion at the ankle joint and aids in flexion at the knee joint. Its actions assist in movements such as walking and running. Which nerve innervates the plantaris muscle? The plantaris muscle is innervated by the tibial nerve, which is responsible for motor control of the muscle. This innervation is crucial for its functional role in lower limb movement. What is the blood supply to the plantaris muscle? The blood supply to the plantaris comes from the lateral sural artery, a branch of the popliteal artery. This vascular supply is important for maintaining the muscle's health and function. Rate This Article