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Intrinsic Muscles of the Foot

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Plantar Surface

Intrinsic muscles of the foot. Plantar intrinsics: Layer 1: 1 = abductor hallucis, 2 = flexor digitorum brevis, 3 = abductor digiti minimi; Layer 2: 4 = quadratus plantae, 5 = lumbricals 1-4; Layer 3: 6 = flexor digiti minimi, 7a = adductor hallucis oblique head, 7b = adductor hallucis transverse head, 8 = flexor hallucis brevis; Layer 4: Dorsal Interossei. Dorsal Intrinsics: 10 = dorsal interossei, 11 = extensor digitorum brevis[1]
A) Intrinsic muscles of the plantar layers of the foot including the 1) Abductor digiti quinti 2) Flexor digitorum brevis 3) Abductor Hallucis 4) Quadratus plantae 5∗) Lumbricals 6) Flexor digiti quinti brevis 7) Adductor halluces oblique head 8) Flexor halluces brevis 9) Adductor hallucis transverse head 10) Plantar interossei B) 11) Dorsal interossei[2]

General

  • There are 10 intrinsic muscles located on the plantar aspect of the foot
  • Collectively, they stabilize the arch of the foot
  • Each individually contributes to control of digits
  • They are innervated by the medial plantar nerve, lateral plantar nerve
  • They are arranged in four layers

First Layer

Second Layer

Third Layer

Fourth Layer

Dorsal Surface

Clinical Significance

  • Needs to be updated

See Also

References

  1. ↑ Fraser, John J., Mark A. Feger, and Jay Hertel. "Midfoot and forefoot involvement in lateral ankle sprains and chronic ankle instability. Part 1: anatomy and biomechanics." International journal of sports physical therapy 11.6 (2016): 992.
  2. ↑ Jastifer, James R. "Intrinsic muscles of the foot: Anatomy, function, rehabilitation." Physical Therapy in Sport 61 (2023): 27-36.
Created by:
John Kiel on 6 November 2024 19:25:20
Authors:
Last edited:
6 February 2025 00:56:39
Category:
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