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Plantar Interossei

  Origin: there are 3 plantar interossei arising from the base and medial plantar surface of the 3rd, 4th, and 5th metatarsal bones.
  Insertion: medial side of the base of the 1st phalanx of the same toe and into the tendons of the Extensor digitorum longus.
  Action: Flex the proximal and extend the distal phalanges and adducts toes toward the axis of 2nd toe.
  Nerve Supply: Lateral plantar, S1S2. (See Innerv. Musc. Lower Limb )
  Synergist: Dorsal Interossei.

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