Flexor Digitorum Longus

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

  • Inversion

  • Flexion of the toes


Innervation

  • Tibial nerve


Daily uses

  • Gripping with the toes


Example exercises

  • Calf raises (bent knee)

  • Seated calf raise machine


Example stretches

  • Soleus stretch

  • Soleus stretch 2

  • Advanced soleus stretch


Related injuries:

  • Inflammation of the extensor tensons of the toes


Related muscles

  • Tibialis posterior

  • Flexor hallucis longus