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Lumbricals

Lumbricals

Description

Origin :

  • Tendons of the flexor digitorum longus.

Insertion :

  • Medial side of the extensor expansion of digits 2-5.

Innervation :

  • Medial (1st) lumbrical: medial plantar nerve; lateral three lumbricals: lateral plantar nerve.

Depth :

  • Superficial

Action

Action :

  • Flex the metatarsophalangeal joint
  • Extend the proximal interphalangeal & distal interphalangeal joints of digits 2 & 3