Misalignment of the ankle and heel causing the ankle to lean more medially; can cause pain or gait abnormalities.

• A. Pronation
• B. Ankle-Foot Orthosis
• C. Orthotics
• D. Onychomycosis

Answer: (A)

Pronation is the inward roll of the foot during stance, with the heel tilting toward the inside as the arch collapses. When this movement is excessive, the ankle leans medially, shifting forces through the foot and leg and often leading to pain and gait abnormalities. The other options describe either devices used to manage alignment (ankle-foot orthosis or orthotics) or a fungal nail condition (onychomycosis), which do not define the inward rotational movement causing the medial tilt.