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Dorsal Interossei of Feet

- See: Plantar Muscles of the Foot:

 Origin: there are 4 dorsal interossei which arise by double pennate fibers from the bases and sides of the bodies of adjacent bones.
 Insertion: base of the proximal phalanx and aponeurosis of the tendons of the Extensor digitorum longus.  The first dorsal interosseus 
            (arising from the 1st an 2nd metatarsals) inserts into the 2nd toe.  The 2nd to 4th dorsal interossei insert into the lateral sides 
            of the 2nd, 3rd, and 4th toes.
        - assists in flexing the proximal phalanx and extending the middle and distal phalanges.
        - abducts the toes from the longitudinal axis of the 2nd toe.
 Nerve Supply: Lateral plantar, S1, S2; (See Innerv. Musc. Lower Limb)
 Synergist: Plantar Interossei

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