Journal article
Muscle Contributions to Balance Control During Amputee and Nonamputee Stair Ascent
Journal of biomechanical engineering, Vol.142(12), 121007
12/01/2020
DOI: 10.1115/1.4047387
PMID: 32469051
Abstract
Dynamic balance is controlled by lower-limb muscles and is more difficult to maintain during stair ascent compared to level walking. As a result, individuals with lower-limb amputations often have difficulty ascending stairs and are more susceptible to falls. The purpose of this study was to identify the biomechanical mechanisms used by individuals with and without amputation to control dynamic balance during stair ascent. Three-dimensional muscle-actuated forward dynamics simulations of amputee and nonamputee stair ascent were developed and contributions of individual muscles, the passive prosthesis, and gravity to the time rate of change of angular momentum were determined. The prosthesis replicated the role of nonamputee plantarflexors in the sagittal plane by contributing to forward angular momentum. The prosthesis largely replicated the role of nonamputee plantarflexors in the transverse plane but resulted in a greater change of angular momentum. In the frontal plane, the prosthesis and nonamputee plantarflexors contributed oppositely during the first half of stance while during the second half of stance, the prosthesis contributed to a much smaller extent. This resulted in altered contributions from the intact leg plantarflexors, vastii and hamstrings, and the intact and residual leg hip abductors. Therefore, prosthetic devices with altered contributions to frontal-plane angular momentum could improve balance control during amputee stair ascent and minimize necessary muscle compensations. In addition, targeted training could improve the force production magnitude and timing of muscles that regulate angular momentum to improve balance control.
Details
- Title: Subtitle
- Muscle Contributions to Balance Control During Amputee and Nonamputee Stair Ascent
- Creators
- Nicole G. Harper - The University of Texas at AustinJason M. Wilken - University of IowaRichard R. Neptune - The University of Texas at Austin
- Resource Type
- Journal article
- Publication Details
- Journal of biomechanical engineering, Vol.142(12), 121007
- Publisher
- Asme
- DOI
- 10.1115/1.4047387
- PMID
- 32469051
- ISSN
- 0148-0731
- eISSN
- 1528-8951
- Number of pages
- 8
- Grant note
- DGE-1110007 / National Science Foundation (NSF) Graduate Research Fellowship; National Science Foundation (NSF) Center for Rehabilitation Sciences Research Grant
- Language
- English
- Date published
- 12/01/2020
- Academic Unit
- Physical Therapy and Rehabilitation Science
- Record Identifier
- 9984295051002771
Metrics
8 Record Views