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Second plantar interosseous of foot: anatomy, location and function

One of three plantar interossei, small muscles beneath the metatarsals in the fourth layer of the sole. Adducts the fourth toe toward the second toe and flexes its metatarsophalangeal joint.

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Highlighted in the model: Second plantar interosseous of foot. Click any part to read about it, or switch off “Highlight topic” to see the whole body. 3D data: BodyParts3D, © The Database Center for Life Science, CC BY 4.0; meshes simplified and recoloured. The model is an adult male.

Second plantar interosseous of foot at a glance

What it is
One of three plantar interossei, small muscles beneath the metatarsals in the fourth layer of the sole.
Location
Arises from the medial side of the fourth metatarsal and inserts onto the medial side of the base of the proximal phalanx of the fourth toe.
Function
Adducts the fourth toe toward the second toe and flexes its metatarsophalangeal joint.
Body system
Muscular · paired (left and right)
FMA ID
FMA37743 (Foundational Model of Anatomy)

Key facts

  • Innervation: lateral plantar nerve (S2–S3)
  • Lies in the fourth (deepest) layer of the sole; plantar interossei are unipennate and adduct toward the second toe.

Structures next to the second plantar interosseous of foot

The nearest named structures in the 3D model, measured from the centre of each part:

References

  1. Foundational Model of Anatomy: Second plantar interosseous of foot (FMA37743). EMBL-EBI Ontology Lookup Service.
  2. OpenStax. Anatomy and Physiology 2e, §11.2 Naming Skeletal Muscles. Rice University, 2022.
  3. 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.