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[Sinus tarsi syndrome: what hurts?].
1Abteilung Anatomie und zelluläre Neurobiologie, Universität Ulm, Albert-Einstein-Allee 11, 89069 Ulm, Deutschland.
Der Unfallchirurg
|January 26, 2008
Summary
Sinus tarsi syndrome, a painful foot condition, is linked to a newly identified "fundiform ligament" within the sinus and canalis tarsi. This ligament and associated fat pads may influence foot mechanics and ankle stability.
Area of Science:
- Anatomy
- Biomechanics
- Orthopedics
Context:
- Sinus tarsi syndrome (STS) is a painful condition often following injury or in athletes.
- Previous understanding of STS has lacked detailed anatomical correlation.
- STS is also associated with flatfoot and specific athletic activities.
Purpose:
- To identify macroscopic mechanical and functional structures within the sinus and canalis tarsi related to STS.
- To propose therapeutic implications based on anatomical findings.
- To re-evaluate the terminology for intra-tarsal ligaments.
Summary:
- A complex fibrous layer, termed the "fundiform ligament" (with medial and lateral bands), was identified in the sinus and canalis tarsi.
- This ligament interacts with extensor tendons and fat pads, suggesting a role in talar control (eversion/inversion) and longitudinal arch support.
- Variations in vascularization or innervation of fat pads may affect joint synovium and ligament tension.
Impact:
- Recommends renaming "interosseous ligaments" to "fundiform ligament" for clarity.
- Provides a new anatomical basis for understanding the mechanics of STS.
- Suggests potential avenues for future research into the role of vascularization and innervation in foot biomechanics and pathology.
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