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Updated: 1/3/2022

Dorsal interossei (LPN)

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  • Summary
      • Dorsal interossei (4 muscles)
      • Origin
      • Two heads from the proximal half of the sides of adjacent metatarsal bones
      • Insertion
      • The two heads of each muscle form a central tendon that insert on the bases of the second, third, and fourth proximal phalanges and into the aponeurosis of the tendons of EDL. The first is inserted into the medial side of the second toe; the other three are inserted into the lateral sides of the 2nd, 3rd, and 4th toes.
      • Action
      • Abduct MTP joint
      • Innervation
      • Lateral plantar nerve
      • Arterial supply
      • Anterior tibial artery via dorsalis pedis and dorsal metatarsal arteries; Posterior tibial artery via lateral plantar and plantar metatarsal arteries

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