Plantar interossei (foot)

The three plantar interossei muscles adduct the third, fourth and little toes toward the long axis through the second toe.

Summary

• origin: medial sides of metatarsals of toes III to V
• insertion: extensor hoods and bases of proximal phalanges of toes III to V
• action: abduction of toes III to V at metatarsophalangeal joints; resist extension of the metatarsophalangeal joints and flexion of the interphalangeal joints
• innervation: lateral plantar nerve from tibial nerve