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Interossei

Interossei

Description

Origin :

  • Base and medial side of metatarsals 3-5.

Insertion :

  • Bases of proximal phalanges and extensor expansions of digits 3.

Innervation :

  • Deep branch of the lateral plantar nerve.

Depth :

  • Superficial

Action

Action :

  • Adduct digits 3-5 (move these digits toward the midline of the foot as defined by a plane through the second digit).
  • Flexes the metacarpophalangeal and extend interphalangeal joints of digits 3-5.