Design and Development of an Assistive Ankle Joint for a Portable Orthotic Device Abstract: An ankle-foot orthosis (AFO) is commonly used to help subjects with weakness of ankle dorsiflexor muscles due to peripheral or central nervous system disorders. Patients having ankle joint disability often suffers from foot drop. This work presents an active ankle-foot orthosis (AAFO) that was designed to allow two degree-of-freedom motion while serving […]