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http://dx.doi.org/10.5143/JESK.2007.26.2.131

Development of the Active Ankle Foot Orthosis to Induce the Normal Gait for the Paralysis Patients  

Hwang, Sung-Jae (Department of Biomedical Engineering, Yonsei University)
Kim, Jung-Yoon (Department of Biomedical Engineering, Yonsei University)
Hwang, Seon-Hong (Department of Biomedical Engineering, Yonsei University)
Park, Sun-Woo (Department of Biomedical Engineering, Yonsei University)
Yi, Jin-Bock (Department of Biomedical Engineering, Yonsei University)
Kim, Young-Ho (Department of Biomedical Engineering, Yonsei University,Institute of Medical Engineering, Yonsei University)
Publication Information
Journal of the Ergonomics Society of Korea / v.26, no.2, 2007 , pp. 131-136 More about this Journal
Abstract
In this study, we developed an active ankle-foot orthosis(AAFO) which can control dorsi/ plantar flexion of the ankle joint to prevent foot drop and toe drag during walking. 3D gait analyses were performed on five healthy subjects under three different gait conditions: the normal gait without AFO, the SAFO gait with the conventional plastic AFO, and the AAFO gait with the developed AFO. As a result, the developed AAFO preeminently induced the normal gait compared to the SAFO. Additionally, AAFO prevented foot drop by proper plantarflexion during loading response and provided enough plantarflexion moment as a driving force to walk forward by sufficient push-off during pre-swing. AAFO also could prevent toe drag by proper dorsiflexion during swing phase. These results indicate that the developed AAFO may have more clinical benefits to treat foot drop and toe drag, compared to conventional AFOs, and also may be useful in patients with other orthotic devices.
Keywords
Active ankle foot orthosis; 3D motion analysis; Gait cycle detection; Foot drop; Toe drag;
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