Flexor Digitorum Longus causes the toes to grip and mold to the floors surface which is vital in maintaining balance on rough surfaces. The tendons pass under the foot. Walking barefoot on an uneven surface is an excellent exercise for this muscle.
Origin - Lower 2/3 of the posterior surface of the tibia.
Insertion - Plantar (bottom) aspect of the base of the distal (furthest) phalanges of each of the four toes.
Actions - Plantarflexion
Flexion of the toes.
Innervation - Tibial nerve.
Daily uses - Gripping with the toes.
Example stretches - Soleus stretch.