Musculus flexor digitorum longus refers to a muscle located in the posterior compartment of the lower leg, specifically the deep muscles of the posterior leg. It is a long, slender muscle that runs along the inner aspect of the leg, originating from the posterior surface of the tibia and the fibula bones.
The primary function of the musculus flexor digitorum longus is to flex the toes, particularly the four lateral toes (second to fifth). This muscle works in coordination with the other muscles of the foot to facilitate flexion of the toes, allowing for actions such as curling the toes downwards or gripping an object with the foot.
Additionally, the musculus flexor digitorum longus plays a crucial role in plantar flexion, the movement that enables pointing the foot downward. It works synergistically with other muscles, including the gastrocnemius and soleus muscles, to produce this movement.
Innervated by the tibial nerve, this muscle receives its blood supply from various arteries such as the posterior tibial artery and peroneal artery. It is a vital muscle for normal locomotion and balance, contributing to the general stability and flexibility of the foot and ankle joints.
Injuries or conditions affecting the musculus flexor digitorum longus can result in limitations in toe movement, reduced plantar flexion strength, or altered gait patterns. Rehabilitation exercises and treatments may be prescribed to address these issues and restore optimal function of the muscle.
