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Plantar interossei

The plantar interossei (also plantar interossei muscles, latin: musculi interossei plantares) are three muscles located in the sole of the foot between the metatarsal bones.

Origin

The plantar interossei muscles originate from medial side of the third, fourth and fifth metatarsal bones.

Insertion

The plantar interossei insert at the proximal phalanges of the third, fourth and fifth digits of the foot.

Action

The main function of the plantar interossei muscles is adduction of toes.

Innervation

The plantar interossei are innervated by the lateral plantar nerve, a terminal branch of the tibial nerve.