First lumbrical of foot at a glance
- What it is
- A small muscle in the sole arising from the flexor digitorum longus tendon to the 2nd toe.
- Location
- Origin: medial side of the tendon of flexor digitorum longus to the 2nd toe. Insertion: medial side of the extensor expansion of the 2nd toe.
- Function
- Flexes the metatarsophalangeal joint and extends the interphalangeal joints of the 2nd toe.
- Body system
- Muscular · paired (left and right)
- FMA ID
- FMA37717 (Foundational Model of Anatomy)
Key facts
- Innervation: medial plantar nerve
- Lies in the second layer of the sole with quadratus plantae and the long flexor tendons.
- It is the only foot lumbrical that is unipennate, arising from a single tendon; the other three arise from two adjacent tendons.
Structures next to the first lumbrical of foot
The nearest named structures in the 3D model, measured from the centre of each part:
- Lateral head of flexor hallucis brevis · muscular
- Oblique head of adductor hallucis · muscular
- Second lumbrical of foot · muscular
- Medial head of flexor hallucis brevis · muscular
- First metatarsal bone · skeletal
- Second metatarsal bone · skeletal
- Third lumbrical of foot · muscular
- Third metatarsal bone · skeletal
- Flexor digitorum brevis · muscular
- First plantar interosseous of foot · muscular
References
- Foundational Model of Anatomy: First lumbrical of foot (FMA37717). EMBL-EBI Ontology Lookup Service.
- OpenStax. Anatomy and Physiology 2e, §11.2 Naming Skeletal Muscles. Rice University, 2022.
- Mitsuhashi N. et al. (2009). BodyParts3D: 3D structure database for anatomical concepts. Nucleic Acids Research 37, D782–D785. Data © The Database Center for Life Science, CC BY 4.0.
Related anatomy
Explore the whole body in the interactive 3D human anatomy model, or browse the A–Z list of human structures.