This site is intended for healthcare professionals
General Practice Notebook
Medical search

lumbrical muscles (foot, anatomy)

FREE subscriptions for doctors and students... click here
You have 3 open access pages.

The four lumbricals muscles of the foot are small and present in the intermediate layer on the plantar surface. They are accessory to the tendons of flexor digitorum longus. They are numbered from medial to lateral.

Their origins vary:

  • the lateral three lumbricals arise from both sides of the cleft where each flexor digitorum longus tendon diverges to the digits
  • the medial lumbrical arises from the medial border of the first tendon of flexor digitorum longus

Passing distally, each muscles runs along the medial side of its respective nearest toe of the lateral four toes. It inserts into the dorsal extensor expansion on the proximal phalanges.

The lumbricals have differing innervations:

  • first lumbrical is from the medial plantar nerve (L4,L5)
  • second to fourth lumbrical is from the lateral plantar nerve (S2, S3)

The lumbricals of the foot act on the lateral four toes to:

  • extend them at the interphalangeal joints
  • flex them at the metatarsophalangeal joints


General Practice Notebook
General Practice Notebook
The information provided herein should not be used for diagnosis or treatment of any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions. Copyright 2016 Oxbridge Solutions LtdĀ®. Any distribution or duplication of the information contained herein is strictly prohibited. Oxbridge Solutions LtdĀ® receives funding from advertising but maintains editorial independence. GPnotebook stores small data files on your computer called cookies so that we can recognise you and provide you with the best service. If you do not want to receive cookies please do not use GPnotebook.