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.



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Wednesday, August 17, 2011 2:05 pm