Author: Lam, Yiu-ping Fermat
Title: Gait evaluation of orthotic treatment for subject with hemiplegic foot-drop
Degree: M.Sc.
Year: 2000
Subject: Hemiplegics -- Rehabilitation
Gait in humans
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Jockey Club Rehabilitation Engineering Centre
Pages: vi, 136 leaves : ill. (chiefly col.) ; 30 cm
Language: English
Abstract: Many patients with hemiplegic foot-drop can reach the relative recovery stage and will then be able to walk unaided. Articulated ankle-foot orthosis (AAFO) was conventionally prescribed to reduce foot-drop and facilitate toe-clearance. However, effective push-off is diminished and the forefoot is not dynamic. Thus, a more productive and beneficial goal and function of the ankle-foot orthosis is required to improve this non-dynamic forefoot condition and produce the effective push-off. Dynamic response ankle-foot orthosis (DAFO) was developed to improve the gait of patients with hemiplegic. The objectives of this study were to investigate and compare the gait of the subjects with hemiplegic foot-drop in the shod (with shoe only) and the orthotic conditions (with the AAFO and DAFO respectively) through a motion analysis system. Gait analysis was performed on nine subjects with hemiplegic foot-drop. A single force platform and a video camcorder (Sharp VL-E8E) were used to capture kinetic and kinematic variables. The collected variables were analyzed using the Motion Toolbox computer software. The results showed that: (1) the positive push-off energy in the DAFO condition was higher than that both in the AAFO and the shod conditions (P<0.05); (2) the medio-lateral ground reaction force in the DAFO condition was smaller than that in the shod condition (P<0.05); (3) the maximum transverse displacement of the centre of pressure in the DAFO condition was smaller than that in the shod condition (p<0.05); and (4) the temporal data including the velocity and the stride length in the DAFO condition were greater than those both in the AAFO and the shod conditions. The dynamic response ankle-foot orthosis (DAFO) not only improve the kinetic, kinematic and temporal variables as the articulated ankle-foot orthosis (AAFO), but also the push-off effect at the late stance phase.
Rights: All rights reserved
Access: restricted access

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