Contribution of ankle-foot orthosis moment in regulating ankle and knee motions during gait in individuals post-stroke
| Autor: | Fan Gao, Toshiki Kobayashi, Madeline L. Singer, K. Bo Foreman, Michael S. Orendurff |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male musculoskeletal diseases 030506 rehabilitation medicine.medical_specialty Motion analysis Knee Joint Biophysics Foot Orthoses Walking Orthotics Article 03 medical and health sciences 0302 clinical medicine Gait (human) Physical medicine and rehabilitation medicine Humans Knee Orthopedics and Sports Medicine Range of Motion Articular Gait Gait Disorders Neurologic Aged Foot Angular displacement business.industry Stroke Rehabilitation Middle Aged Biomechanical Phenomena Stroke Moment (mathematics) medicine.anatomical_structure Female Stress Mechanical Ankle 0305 other medical science business Range of motion human activities Ankle Joint 030217 neurology & neurosurgery |
| Zdroj: | Clinical Biomechanics. 45:9-13 |
| ISSN: | 0268-0033 |
| DOI: | 10.1016/j.clinbiomech.2017.04.002 |
| Popis: | Background Ankle-foot orthosis moment resisting plantarflexion has systematic effects on ankle and knee joint motion in individuals post-stroke. However, it is not known how much ankle-foot orthosis moment is generated to regulate their motion. The aim of this study was to quantify the contribution of an articulated ankle-foot orthosis moment to regulate ankle and knee joint motion during gait in individuals post-stroke. Methods Gait data were collected from 10 individuals post-stroke using a Bertec split-belt instrumented treadmill and a Vicon 3-dimensional motion analysis system. Each participant wore an articulated ankle-foot orthosis whose moment resisting plantarflexion was adjustable at four levels. Ankle-foot orthosis moment while walking was calculated under the four levels based on angle-moment relationship of the ankle-foot orthosis around the ankle joint measured by bench testing. The ankle-foot orthosis moment and the joint angular position (ankle and knee) relationship in a gait cycle was plotted to quantify the ankle-foot orthosis moment needed to regulate the joint motion. Findings Ankle and knee joint motion were regulated according to the amount of ankle-foot orthosis moment during gait. The ankle-foot orthosis maintained the ankle angular position in dorsiflexion and knee angular position in flexion throughout a gait cycle when it generated moment from − 0.029 (0.011) to − 0.062 (0.019) Nm/kg (moment resisting plantarflexion was defined as negative). Interpretations Quantifying the contribution of ankle-foot orthosis moment needed to regulate lower limb joints within a specific range of motion could provide valuable criteria to design an ankle-foot orthosis for individuals post-stroke. |
| Databáze: | OpenAIRE |
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