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dc.contributor.advisorBuckley, John G.
dc.contributor.authorAbdulhasan, Zahraa M.*
dc.date.accessioned2019-03-21T15:02:01Z
dc.date.available2019-03-21T15:02:01Z
dc.date.issued2018
dc.identifier.urihttp://hdl.handle.net/10454/16906
dc.description.abstractThe major objective of this thesis was to investigate how the use of a recently developed microprocessor-controlled limb system altered the negative mechanical work done by the intact and prosthetic limb when trans-femoral amputees terminated gait. Participants terminated gait on a level surface from their self-selected walking speed and on declined surface from slow and customary speeds, using limb system prosthesis with microprocessor active or inactive. Limb negative work, determined as the integral of the negative mechanical (external) limb power during the braking phase, was compared across surface, speed and microprocessor conditions. Halting gait was achieved predominantly from negative work done by the trailing/intact. Trailing versus leading limb mechanical work imbalance was similar to how able body individuals halted gait. Importantly, the negative limb work performed on the prosthetic side when terminating gait on declined surface was increased when the microprocessor was active for both slow and customary speeds (no difference on level surface) but no change on intact limb. This indicates the limb system’s ‘ramp-descent mode’ effectively/dynamically altered the hydraulic resistances at the respective joints with evidence indicating changes at the ankle were the key factor for increasing the prosthetic limb negative work contribution. Findings suggest that trans-femoral amputees became more assured using their prosthetic limb to arrest body centre of mass velocity when the limb system’s microprocessor was active. More generally findings suggest, trans-femoral amputees should obtain clinically significant biomechanical benefits from using a limb system prosthesis for locomotion involving adapting to their everyday walking where adaptations to an endlessly changing environment are required.en_US
dc.description.sponsorshipHigher Committee of Education Development in IRAQ (HCED)en_US
dc.language.isoenen_US
dc.rights<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>.eng
dc.subjectGait terminationen_US
dc.subjectRamp descenten_US
dc.subjectTrans-femoral amputeeen_US
dc.subjectAbove-knee prosthesisen_US
dc.subjectLimb mechanical worken_US
dc.subjectMicroprocessor-controlled limb systemen_US
dc.titleImpact of combined microprocessor control of the prosthetic knee and ankle on gait termination in unilateral trans-femoral amputees. Limb mechanical work performed on centre of mass to terminate gait on a declined surface using linx prosthetic deviceen_US
dc.type.qualificationleveldoctoralen_US
dc.publisher.institutionUniversity of Bradfordeng
dc.publisher.departmentDivision of Biomedical Engineering, School of Engineeringen_US
dc.typeThesiseng
dc.type.qualificationnamePhDen_US
dc.date.awarded2018
refterms.dateFOA2019-03-21T15:02:02Z


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