First cuneometatarsal interosseous ligament
Primum ligamentum cuneometatarseum interosseus
- Latin synonym: Ligamentum cuneometatarseum interosseus medialis
- Synonym: First cuneometatarsal interosseous ligament; Lisfranc joint ligamentous complex
- Latin eponym: Ligamentum Lisfranci
- Eponym: Lisfranc's ligament
- Related terms: Interosseous Lisfranc's ligament; First cuneometatarsal interosseous ligament
Definition
The First cuneometatarsal interosseous ligament or interosseous Lisfranc ligament (Lisfranc's ligament proper) is a strong, fasciculated interosseous ligament that connects the lateral surface of the medial cuneiform (C1) to the medial surface of the base of the second metatarsal (M2). It is the principal stabilizer of the second tarsometatarsal joint and is the thickest and strongest component of the Lisfranc ligamentous complex.
The ligament typically consists of one to four fasciculi, with a mean of two, and has a variable cross-sectional area (mean reported around 88 mm²). Its fibers run obliquely and horizontally from C1 to M2, deep to the dorsal and plantar Lisfranc ligaments. The attachment on the medial cuneiform is usually located centrally and slightly plantar to the articular surface, while the insertion on the second metatarsal is just distal to the C2-M2 joint surface. The ligament may show anatomical variation, including single- or double-bundle arrangements, but always maintains a single attachment to the second metatarsal.
References
Sources: Ablimit, A., Ding, HY. & Liu, LG. Magnetic resonance imaging of the Lisfranc ligament. J Orthop Surg Res 13, 282 (2018).
