The short plantar ligament (plantar calcaneocuboid ligament) is a broad, short ligament connecting the anterior calcaneus to the cuboid, providing the primary stabilisation of the calcaneocuboid joint and supporting the lateral foot arch. It lies deep to the long plantar ligament. Its disruption in lateral column overloading contributes to lateral midfoot instability distinct from the medial arch collapse of spring ligament failure.
| Origin | Anterior tubercle on the plantar surface of the calcaneus |
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| Insertion | Plantar surface of the cuboid behind the groove for the fibularis longus tendon |
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Supports the calcaneocuboid joint and the lateral longitudinal arch from below.
The short and long plantar ligaments are the main ligamentous supports of the lateral longitudinal arch. Insufficiency of the short plantar ligament contributes to lateral column sag in progressive flatfoot, which may be addressed with lateral column lengthening osteotomy. Short plantar ligament tears are identified on MRI after calcaneocuboid joint injuries and in inflammatory arthritis affecting the midfoot.
Calcaneocuboid joint strain from lateral foot loading producing lateral midfoot pain managed conservatively with orthotic support.
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