Which is an indication for the use of an ankle-foot orthosis (AFO)?

Which is an indication for the use of an ankle-foot orthosis (AFO)?

• A. Medial and lateral instability of knee or ankle
• B. Insufficient knee extension moment
• C. Lack of/ineffective push-off
• D. Inadequate toe clearance

Answer: (A)

An AFO is chosen mainly to stabilize the ankle and control side-to-side (medial–lateral) motion that can destabilize the knee during stance. By bracing the ankle and subtalar joints, it limits unwanted inversion or eversion, keeps the tibia aligned, and reduces compensatory knee movements such as valgus or varus. This stabilizes gait, improves balance, and makes walking safer and more efficient. Problems like insufficient knee extension moment are more about knee power and propulsion and may require different solutions, while lack of push-off or inadequate toe clearance involve propulsion or swing-phase control, which aren’t the primary reasons to prescribe a standard AFO.

An AFO is chosen mainly to stabilize the ankle and control side-to-side (medial–lateral) motion that can destabilize the knee during stance. By bracing the ankle and subtalar joints, it limits unwanted inversion or eversion, keeps the tibia aligned, and reduces compensatory knee movements such as valgus or varus. This stabilizes gait, improves balance, and makes walking safer and more efficient.

Problems like insufficient knee extension moment are more about knee power and propulsion and may require different solutions, while lack of push-off or inadequate toe clearance involve propulsion or swing-phase control, which aren’t the primary reasons to prescribe a standard AFO.