Amputee perception of prosthetic ankle stiffness during locomotion
dc.contributor.author | Shepherd, Max K | |
dc.contributor.author | Azocar, Alejandro F | |
dc.contributor.author | Major, Matthew J | |
dc.contributor.author | Rouse, Elliott J | |
dc.date.accessioned | 2018-11-11T08:08:18Z | |
dc.date.available | 2018-11-11T08:08:18Z | |
dc.date.issued | 2018-11-08 | |
dc.identifier.citation | Journal of NeuroEngineering and Rehabilitation. 2018 Nov 08;15(1):99 | |
dc.identifier.uri | https://doi.org/10.1186/s12984-018-0432-5 | |
dc.identifier.uri | https://hdl.handle.net/2027.42/146187 | |
dc.description.abstract | Abstract Background Prosthetic feet are spring-like, and their stiffness critically affects the wearer’s stability, comfort, and energetic cost of walking. Despite the importance of stiffness in ambulation, the prescription process often entails testing a limited number of prostheses, which may result in patients receiving a foot with suboptimal mechanics. To understand the resolution with which prostheses should be individually optimized, we sought to characterize below-knee prosthesis users’ psychophysical sensitivity to prosthesis stiffness. Methods We used a novel variable-stiffness ankle prosthesis to measure the repeatability of user-selected preferred stiffness, and implemented a psychophysical experiment to characterize the just noticeable difference of stiffness during locomotion. Results All eight subjects with below-knee amputation exhibited high repeatability in selecting their Preferred Stiffness (mean coefficient of variation: 14.2 ± 1.7%) and were able to correctly identify a 7.7 ± 1.3% change in ankle stiffness (with 75% accuracy). Conclusions This high sensitivity suggests prosthetic foot stiffness should be tuned with a high degree of precision on an individual basis. These results also highlight the need for a pairing of new robotic prescription tools and mechanical characterizations of prosthetic feet. | |
dc.title | Amputee perception of prosthetic ankle stiffness during locomotion | |
dc.type | Article | en_US |
dc.description.bitstreamurl | https://deepblue.lib.umich.edu/bitstream/2027.42/146187/1/12984_2018_Article_432.pdf | |
dc.language.rfc3066 | en | |
dc.rights.holder | The Author(s). | |
dc.date.updated | 2018-11-11T08:08:22Z | |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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