Fourth lumbrical of foot at a glance
- What it is
- A small muscle in the sole acting on the 5th toe.
- Location
- Origin: adjacent sides of the tendons of flexor digitorum longus to the 4th and 5th toes. Insertion: medial side of the extensor expansion of the 5th toe.
- Function
- Flexes the metatarsophalangeal joint and extends the interphalangeal joints of the little toe.
- Body system
- Muscular · paired (left and right)
- FMA ID
- FMA37483 (Foundational Model of Anatomy)
Key facts
- Innervation: lateral plantar nerve
- Lies in the second layer of the sole.
- Like the second and third lumbricals of the foot, it is bipennate and supplied by the deep branch of the lateral plantar nerve.
Structures next to the fourth lumbrical of foot
The nearest named structures in the 3D model, measured from the centre of each part:
- Third lumbrical of foot · muscular
- Fourth metatarsal bone · skeletal
- Third plantar interosseous of foot · muscular
- Flexor digitorum brevis · muscular
- Flexor digiti minimi brevis of foot · muscular
- Second plantar interosseous of foot · muscular
- Fifth metatarsal bone · skeletal
- Second lumbrical of foot · muscular
- Third metatarsal bone · skeletal
- Oblique head of adductor hallucis · muscular
References
- Foundational Model of Anatomy: Fourth lumbrical of foot (FMA37483). 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.