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Spring Ligament Complex

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Description

  • General
    • Term 'spring ligament' is a misnomer, there are no elastic or spring-like properties
    • Functions like a normal ligament
  • Composed of 3 ligaments
    • Superior medial calcaneonavicular (SMCN)
      • This bundle is a broad, triangular-shaped ligament that fans out from the anteromedial margin of the sustentaculum of the calcaneus
      • Insert on the navicular margin[1]
      • Contains an overlying layer of fibrocartilage for articulation with the talar head
    • Inferior calcaneonavicular (ICN)
      • Narrow band like, quadrilateral ligament with its origin between the anterior and middle facets of the sustentaculum
      • Inserts plantarly on the lateral portion of the navicular
    • Medial plantar oblique (MPO), sometimes called “third ligament”
      • Originates from the facet between anterior and middle facets of the calcaneus
      • Courses more medially than the ICN, deep to the fibrocartilage of the SMCN
      • Has some continuity with fibers of the deltoid, specifically the tibiocalcaneonavicular ligament
    • Spring ligament recess is an outpouching of the plantar capsule of the talonavicular joint between the ICN and MPO portions

Actions

  • Acts as a static restraint to the arch[2]
    • In conjunction with the plantar fascia, tibionavicular ligament, long and short plantar ligaments, and the talocalcaneal ligament
  • Acts as a sling for the talar head (acetabulum pedis)[3]
    • Preventing the talar head from plantarflexing
  • Prevents subluxation of the talonavicular joint
    • Incompetence or injury of the spring ligament
    • May allow subluxation of the talonavicular joint
    • The talar head sags into plantarflexion with associated abduction through the transverse tarsal joint
    • Eversion of the calcaneus leading to hindfoot valgus

Vascular Supply


Innervation


Clinical Significance


See Also


References

  1. Davis WH, Sobel M, DiCarlo EF, et al. Gross, histological, and microvascular anatomy and biomechanical testing of the spring ligament complex. Foot Ankle Int 1996;17(2):95–102.
  2. Kitaoka HB, Ahn TK, Luo ZP, et al. Stability of the arch of the foot. Foot Ankle Int 1997;18(10):644–8.
  3. Desai KR, Beltran LS, Bencardino JT, et al. The spring ligament recess of the talocalcaneonavicular joint: depiction on MR images with cadaveric and histologic correlation. AJR Am J Roentgenol 2011;196(5):1145–50.
Created by:
John Kiel on 29 January 2022 05:27:04
Authors:
Last edited:
29 January 2022 05:41:31
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