Flexor digitorum longus

Flexor Digitorum Longus is a muscle located in the posterior compartment of the leg that helps in the flexion of the toes. It is one of the three deep muscles of the posterior compartment of the leg, the others being Tibialis posterior and Flexor hallucis longus.

Anatomy

The Flexor Digitorum Longus originates from the upper three-quarters of the posterior surface of the body of the tibia, from the posterior surface of the fibula, and from the interosseous membrane. It is inserted into the base of the distal phalanges of the four lesser toes.

Function

The Flexor Digitorum Longus acts to flex the second through fifth toes, plantarflex and invert the foot, and support the longitudinal arches of the foot.

Clinical Significance

Injury or strain to the Flexor Digitorum Longus can result in foot and toe pain. It can also be involved in conditions such as plantar fasciitis and flat foot.

See Also

• Muscles of the lower limb
• Tibialis posterior
• Flexor hallucis longus

References

Flexor digitorum longus Resources
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