Flexor digitorum longus muscle

The flexor digitorum longus muscle is a muscle located on the posterior aspect of the leg. It is one of the deep muscles of the posterior compartment of the leg and plays a crucial role in the movement of the foot and toes.

Anatomy

The flexor digitorum longus muscle originates from the posterior surface of the body of the tibia. It travels down the leg, passing behind the medial malleolus of the ankle, and divides into four tendons. These tendons insert into the bases of the distal phalanges of the four lesser toes (second to fifth toes).

Innervation

The muscle is innervated by the tibial nerve, which is a branch of the sciatic nerve.

Blood Supply

The blood supply to the flexor digitorum longus muscle is provided by the posterior tibial artery.

Function

The primary function of the flexor digitorum longus muscle is to flex the toes. It also assists in plantar flexion of the ankle and inversion of the foot. This muscle is essential for activities such as walking, running, and gripping objects with the toes.

Clinical Significance

Injuries or conditions affecting the flexor digitorum longus muscle can lead to difficulties in toe flexion and overall foot movement. Conditions such as tendinitis or tendon rupture can impair the function of this muscle.

See Also

• Flexor hallucis longus muscle
• Extensor digitorum longus muscle
• Posterior tibial artery
• Tibial nerve

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