What causes the foot deformities in spina bifida?

What causes the foot deformities in spina bifida?

• A. Partial innervation and muscle imbalance
• B. Vitamin C deficiency
• C. Excess calcium in bones
• D. Overuse injuries

Answer: (A)

Foot deformities in spina bifida come from partial innervation of the lower limbs, which creates a persistent muscle imbalance around the foot and ankle. When nerves serving the leg are not delivering normal signals, some muscles become relatively weak while others may be relatively overactive. This unbalanced muscle pull alters the forces on bones and tendons during growth, leading to fixed deformities such as clubfoot, hindfoot misalignment, and arches that develop abnormally. These neuromuscular-driven changes explain why foot deformities are common in spina bifida and why correcting them typically involves addressing the muscle balance with casting, bracing, or surgery. The other options don’t fit this pattern: vitamin C deficiency causes systemic issues like poor collagen and gum disease, not a neuromuscular-driven foot deformity; excess calcium isn’t the driver of these deformities; and overuse injuries don’t reflect congenital nerve-related imbalance in spina bifida.

Foot deformities in spina bifida come from partial innervation of the lower limbs, which creates a persistent muscle imbalance around the foot and ankle. When nerves serving the leg are not delivering normal signals, some muscles become relatively weak while others may be relatively overactive. This unbalanced muscle pull alters the forces on bones and tendons during growth, leading to fixed deformities such as clubfoot, hindfoot misalignment, and arches that develop abnormally. These neuromuscular-driven changes explain why foot deformities are common in spina bifida and why correcting them typically involves addressing the muscle balance with casting, bracing, or surgery. The other options don’t fit this pattern: vitamin C deficiency causes systemic issues like poor collagen and gum disease, not a neuromuscular-driven foot deformity; excess calcium isn’t the driver of these deformities; and overuse injuries don’t reflect congenital nerve-related imbalance in spina bifida.