Dorsal Interossei of the Foot
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Description[edit | edit source]
The dorsal interossei muscles are a group of four bicephalic muscles that fill the space between the metatarsal bones of the foot. Their function lies in spreading the toes apart and in flexing the metatarsophalangeal joints of the second to fifth toe.
Origin[edit | edit source]
The interossei dorsales pedis originate on the base of the metatarsal bones I-V[1]. With two heads each, they emenate from the two adjacent bone sides facing each other and integrate into one insertion. Parts of of the Mm. interossei dorsales pedis originate from the Lig. plantare longum which is situated on the bottom side of the foot.
They are part of the deep central forefoot compartment[2], also described as the forth layer [3].
Insertion[edit | edit source]
The M.interosseus dorsalis I inserts on the medial side of the base of the second toe's phalanx proximalis[1].
The Mm. interossei dorsales II-IV insert on the lateral side of the base of phalanges proximales II-IV[1].
Nerve[edit | edit source]
Nervus plantaris lateralis, S2-S3; (Nervus tibialis) [1]
Function[edit | edit source]
- Flexion of the metatarso-phalangeal joints (MTPJ) II-IV, medial adduction of the second toe and lateral adduction of the third and fourth toe[1]
- Extension of the proximal phalangeal joints II-IV[1]
Synergists[edit | edit source]
MTPJ II-IV[4]:
- Flexion: M. flexor digitorum longus, M. flexor digitorum brevis, Mm. interossei plantares 1-2 (III-IV), Mm. lumbricales pedis 1-3 (II-IV)
Antagonists[edit | edit source]
MTPJ II-IV[4]:
- Flexion: M. extensor digitorum longus, M. extensor digitorum brevis
- Abduction: Mm. interossei plantares 1-2 (III-IV)
Clinical relevance[edit | edit source]
Assessment[edit | edit source]
Treatment[edit | edit source]
Resources[edit | edit source]
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Putz, R., & der Anatomie, P. R. S. A. (2004). des Menschen. Limitierte Jubiläumsausgabe: der komplette Atlas in einem Band. 21. Aufl.
- ↑ Faymonville, C., Andermahr, J., Seidel, U., Müller, L. P., Skouras, E., Eysel, P., & Stein, G. (2012). Compartments of the foot: topographic anatomy. Surgical and radiologic anatomy, 34(10), 929-933.
- ↑ Teach Me Anatomy Series (2020). Muscles of the foot. Internet document: https://teachmeanatomy.info/lower-limb/muscles/foot/ [last accessed: 22.09.2020]
- ↑ 4.0 4.1 Valerius, K. P., Frank, A., Kolster, B. C., Hamilton, C., Alejandre Lafont, E., & Kreutzer, R. (2002). Das Muskelbuch. Anatomie Untersuchung Bewegung, 6.
