An ankle-foot orthotic device is designed to closely simulate the natural movement of a lower extremity throughout a proper walking gait cycle. The ZSM-5-type zeolite has a silicaalumina molar ratio of at least 200. A user can select a desired recognition candidate from a choice list produced by such filtered word recognition. A locking spindle assembly is rotatably received in the longitudinal bore, and is configured to selectively operate the coupling mechanism to couple the exterior operator assembly to the outer spindle upon actuation of a drive assembly.