Navicular drop test protocol describes marking navicular height in which positions and calculating the difference?

Navicular drop test protocol describes marking navicular height in which positions and calculating the difference?

• A. Navicular height is marked and measured seated and standing, and the difference is calculated
• B. Navicular height is marked only while standing
• C. Navicular height is marked only while seated
• D. Navicular height is marked while the patient walks

Answer: (A)

The test measures how much the arch collapses when weight is applied by comparing navicular height in two static positions and taking the difference. Mark the navicular tuberosity, then measure its height from a fixed baseline (like the floor) while the foot is in a seated, non–weight-bearing position. Next, have the patient stand with even weight distribution and measure navicular height again. The difference between the standing height and the seated height is the navicular drop. A larger drop indicates more arch collapse and likely overpronation. This approach matters because it captures the change in arch height under load, something you wouldn’t see by measuring in just one position or while moving.

The test measures how much the arch collapses when weight is applied by comparing navicular height in two static positions and taking the difference.

Mark the navicular tuberosity, then measure its height from a fixed baseline (like the floor) while the foot is in a seated, non–weight-bearing position. Next, have the patient stand with even weight distribution and measure navicular height again. The difference between the standing height and the seated height is the navicular drop. A larger drop indicates more arch collapse and likely overpronation.

This approach matters because it captures the change in arch height under load, something you wouldn’t see by measuring in just one position or while moving.