| Physiological modulation of gait variables by an active partial body weight support system. | |
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MedLine Citation:
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PMID: 17583716 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Partial body weight support (PBWS) systems used for rehabilitation status post-neurological and musculoskeletal pathologies and injuries are traditionally passive. Our purpose was to demonstrate the ability of an actively controlled PBWS system to provide a clinically relevant modulated support condition while investigating the impact of such a condition on the dynamics of gait. Using an instrumented treadmill and a motion capture system, we compared gait parameters of six healthy young adults (age 24-31 years) during unsupported walking to those under the assistance of two support conditions (a constant 20% body weight support, and a modulated support providing 20% body weight support during the loading response of each leg while allowing for an unsupported terminal stance). The modulated condition achieved support synchronized to gait cycle events with mean and maximum loading errors at the 20% body weight support level equal to 1.01 and 2.44 kg, respectively. Constant support significantly reduced sagittal plane hip angle range of motion and increased ankle platarflexion as compared to unsupported walking (p < 0.05). Also, a clear trend of decreased stride length was observed for constant support. No significant differences in these parameters were evident between the modulated support condition and unsupported walking. Ankle power generation and absorption both significantly decreased under constant support. The modulated support condition significantly increased ankle power absorption though showed no change in ankle power generation. The ability of the presented active PBWS device to provide individualized support schemes may offer new and possibly improved applications of PBWS rehabilitation. |
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Authors:
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Jason R Franz; Matthias Glauser; Patrick O Riley; Ugo Della Croce; Frederic Newton; Paul E Allaire; D Casey Kerrigan |
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Publication Detail:
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Type: Journal Article Date: 2007-06-20 |
Journal Detail:
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Title: Journal of biomechanics Volume: 40 ISSN: 0021-9290 ISO Abbreviation: J Biomech Publication Date: 2007 |
Date Detail:
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Created Date: 2007-10-15 Completed Date: 2007-12-17 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0157375 Medline TA: J Biomech Country: United States |
Other Details:
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Languages: eng Pagination: 3244-50 Citation Subset: IM |
Affiliation:
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Department of Physical Medicine and Rehabilitation, University of Virginia, Charlottesville, VA, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Ankle / anatomy & histology Biomechanics Body Weight* Female Gait / physiology* Humans Male Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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