What provides stability to the 1st MPJ?

What provides stability to the 1st MPJ?

• A. Collateral ligaments
• B. Interosseous membrane
• C. Dorsal capsule
• D. Plantar fascia

Answer: (A)

The primary stabilizers of the first MTP joint are the collateral ligaments. These paired ligaments run along the sides of the metatarsal head to the base of the proximal phalanx, providing restraint against sideways (varus/valgus) forces and helping keep the great toe aligned during weight bearing and push-off. They work together with the plantar plate and joint capsule to maintain stability, but the collateral ligaments are the main restraint to medial–lateral movement at this joint. The interosseous membrane is a leg structure and not involved in the first MTP joint's stability, while the dorsal capsule and plantar fascia contribute to overall joint and arch support but are not the primary stabilizers of the 1st MPJ.

The primary stabilizers of the first MTP joint are the collateral ligaments. These paired ligaments run along the sides of the metatarsal head to the base of the proximal phalanx, providing restraint against sideways (varus/valgus) forces and helping keep the great toe aligned during weight bearing and push-off. They work together with the plantar plate and joint capsule to maintain stability, but the collateral ligaments are the main restraint to medial–lateral movement at this joint. The interosseous membrane is a leg structure and not involved in the first MTP joint's stability, while the dorsal capsule and plantar fascia contribute to overall joint and arch support but are not the primary stabilizers of the 1st MPJ.