Ankle-foot orthosis: A brace, usually made of plastic, that is worn on the lower leg and foot to support the ankle, hold the foot and ankle in the correct position and correct foot drop. Abbreviated AFO. Also known as foot drop brace. QUESTION Walking can maintain your body weight and lower many health risks. True or false? See Answer From Fitness Resources Diet Tips for Every Age: How to Eat Better5 Worst Workouts, According to Science Featured Centers What Are the Best PsA Treatments for You?Understanding Biologics 10 Things People With Depression Wish You Knew Health Solutions From Our Sponsors Shot-Free MS Treatment Your Child and COVID-19