| A study on balance maintenance strategies during walking - a simulation study. | |
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MedLine Citation:
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PMID: 19163857 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Walking assist systems should cope with both the external perturbation caused by slips, uneven terrain, slopes, and obstacles, and local function impairment caused by internal factors, like spastic paralysis. It is known that humans are able to cope with these difficulties by different strategies. One is that in the case when external perturbation occurs, especially when the occurrence cannot be predicted or perceived in advance, humans rely on reflexes, which cause unconscious, relatively fixed muscular response patterns to perturbations within a short period of time. Another is that in the case of local function impairment, humans generally develop compensated gait to overcome the falling-down risky factors. In this study, we investigated the both strategies by constructing a human walking model that consists of Central Pattern Generator (CPG) module. As the reflexive mechanism, we used muscle activity profiles acquired from human gait experiments, together with a CPG-phase-modulation, and we examined of the roles of these two reflexive mechanisms. Besides, we modeled a spastic hemiplegic gait by modulating some specific neuron's output, in order to study another strategy, compensated walking. The results indicated that the simulation model could display behavior resembling that of normal human walking, and on the occurrence of a slip-perturbation, together with the CPG-phase-modulation, the rapid muscular response could improve perturbation-resistance and maintain balance for the simulated walker. Moreover, the pes equinus caused by the spasticity in Gastrocnemius could be modelled and falling down risk resulted from the pes equinus could be reduced by the simulated compensated walking. |
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Authors:
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Yu Ikemoto; Wenwei Yu; Jun Inoue |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference Volume: 2008 ISSN: 1557-170X ISO Abbreviation: Conf Proc IEEE Eng Med Biol Soc Publication Date: 2008 |
Date Detail:
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Created Date: 2009-02-16 Completed Date: 2009-05-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101243413 Medline TA: Conf Proc IEEE Eng Med Biol Soc Country: United States |
Other Details:
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Languages: eng Pagination: 5073-6 Citation Subset: IM |
Affiliation:
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Department of Medical System Engineering, Chiba University, Japan. yikemoto@graduate.chiba-u.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Biological Clocks
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physiology* Computer Simulation Gait / physiology* Humans Male Models, Biological* Muscle Contraction / physiology* Muscle, Skeletal / physiology* Postural Balance / physiology* Walking / physiology* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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