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- See: Plantar Muscles of the Foot:
        Innerv. Musc. Lower Limb

  Origin: the lateral process of the tuberosity of calcaneus.
  Insertion: lateral side of the base of the proximal phalanx of the 5th toe.
  Action: Spreads the 5th toe away from the 4th toe.
  Nerve Supply: lateral plantar nerve, S1, S2