Arianna S. Monteiro , Matthew J. Major , Nicholas P. Fey
{"title":"经胫性肢体丧失影响老年人步行时的肌肉兴奋、三维动态平衡及其横断面相关性","authors":"Arianna S. Monteiro , Matthew J. Major , Nicholas P. Fey","doi":"10.1016/j.clinbiomech.2025.106535","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><div>Two-thirds of individuals with amputations in large cities are older. Our study identifies how lower-limb amputation alters dynamic balance, muscle excitation and their relationship across samples of older individuals at multiple walking speeds. We hypothesized that individuals with amputation would express different relationships between their muscle excitation and 3D dynamic balance, which would depend on speed.</div></div><div><h3>Methods</h3><div>Angular momenta of the body and individual segments, as well as bilateral electromyography signals of five muscles were compared between individuals with (<em>n</em> = 13) and without (<em>n</em> = 10) below-knee amputation at self-selected normal and fast speeds, using Statistical Parametric Mapping. We also related balance and muscle excitation through Pearson correlations of angular momenta and electromyography (α = 0.05).</div></div><div><h3>Findings</h3><div>There were multiple increases (and few decreases) in whole-body and segmental angular momenta for individuals with amputation during early, mid and late stance as well as terminal swing, especially in the sagittal plane. Excitation of the medial hamstring of the residual leg in late swing was decreased at both speeds in individuals with amputations. Generally, both groups had positive correlations between muscle excitation and angular momenta. However, interesting exceptions occurred for the group with amputation such as a negative relationship between the medial hamstring of the residual limb and whole-body angular momentum in the transverse plane at normal walking speeds, where increased muscle activity was associated with more balanced individuals.</div></div><div><h3>Interpretation</h3><div>Use of prostheses during walking by older individuals influences dynamic balance, muscle coordination, and their correlation. Observability of these differences depends on speed and anatomical plane.</div></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":"125 ","pages":"Article 106535"},"PeriodicalIF":1.4000,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Transtibial limb loss influences muscle excitation, 3D dynamic balance and their cross-sectional correlation in older individuals during walking\",\"authors\":\"Arianna S. Monteiro , Matthew J. Major , Nicholas P. Fey\",\"doi\":\"10.1016/j.clinbiomech.2025.106535\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Background</h3><div>Two-thirds of individuals with amputations in large cities are older. Our study identifies how lower-limb amputation alters dynamic balance, muscle excitation and their relationship across samples of older individuals at multiple walking speeds. We hypothesized that individuals with amputation would express different relationships between their muscle excitation and 3D dynamic balance, which would depend on speed.</div></div><div><h3>Methods</h3><div>Angular momenta of the body and individual segments, as well as bilateral electromyography signals of five muscles were compared between individuals with (<em>n</em> = 13) and without (<em>n</em> = 10) below-knee amputation at self-selected normal and fast speeds, using Statistical Parametric Mapping. We also related balance and muscle excitation through Pearson correlations of angular momenta and electromyography (α = 0.05).</div></div><div><h3>Findings</h3><div>There were multiple increases (and few decreases) in whole-body and segmental angular momenta for individuals with amputation during early, mid and late stance as well as terminal swing, especially in the sagittal plane. Excitation of the medial hamstring of the residual leg in late swing was decreased at both speeds in individuals with amputations. Generally, both groups had positive correlations between muscle excitation and angular momenta. However, interesting exceptions occurred for the group with amputation such as a negative relationship between the medial hamstring of the residual limb and whole-body angular momentum in the transverse plane at normal walking speeds, where increased muscle activity was associated with more balanced individuals.</div></div><div><h3>Interpretation</h3><div>Use of prostheses during walking by older individuals influences dynamic balance, muscle coordination, and their correlation. Observability of these differences depends on speed and anatomical plane.</div></div>\",\"PeriodicalId\":50992,\"journal\":{\"name\":\"Clinical Biomechanics\",\"volume\":\"125 \",\"pages\":\"Article 106535\"},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2025-04-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Clinical Biomechanics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0268003325001081\",\"RegionNum\":3,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, BIOMEDICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Clinical Biomechanics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0268003325001081","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, BIOMEDICAL","Score":null,"Total":0}
Transtibial limb loss influences muscle excitation, 3D dynamic balance and their cross-sectional correlation in older individuals during walking
Background
Two-thirds of individuals with amputations in large cities are older. Our study identifies how lower-limb amputation alters dynamic balance, muscle excitation and their relationship across samples of older individuals at multiple walking speeds. We hypothesized that individuals with amputation would express different relationships between their muscle excitation and 3D dynamic balance, which would depend on speed.
Methods
Angular momenta of the body and individual segments, as well as bilateral electromyography signals of five muscles were compared between individuals with (n = 13) and without (n = 10) below-knee amputation at self-selected normal and fast speeds, using Statistical Parametric Mapping. We also related balance and muscle excitation through Pearson correlations of angular momenta and electromyography (α = 0.05).
Findings
There were multiple increases (and few decreases) in whole-body and segmental angular momenta for individuals with amputation during early, mid and late stance as well as terminal swing, especially in the sagittal plane. Excitation of the medial hamstring of the residual leg in late swing was decreased at both speeds in individuals with amputations. Generally, both groups had positive correlations between muscle excitation and angular momenta. However, interesting exceptions occurred for the group with amputation such as a negative relationship between the medial hamstring of the residual limb and whole-body angular momentum in the transverse plane at normal walking speeds, where increased muscle activity was associated with more balanced individuals.
Interpretation
Use of prostheses during walking by older individuals influences dynamic balance, muscle coordination, and their correlation. Observability of these differences depends on speed and anatomical plane.
期刊介绍:
Clinical Biomechanics is an international multidisciplinary journal of biomechanics with a focus on medical and clinical applications of new knowledge in the field.
The science of biomechanics helps explain the causes of cell, tissue, organ and body system disorders, and supports clinicians in the diagnosis, prognosis and evaluation of treatment methods and technologies. Clinical Biomechanics aims to strengthen the links between laboratory and clinic by publishing cutting-edge biomechanics research which helps to explain the causes of injury and disease, and which provides evidence contributing to improved clinical management.
A rigorous peer review system is employed and every attempt is made to process and publish top-quality papers promptly.
Clinical Biomechanics explores all facets of body system, organ, tissue and cell biomechanics, with an emphasis on medical and clinical applications of the basic science aspects. The role of basic science is therefore recognized in a medical or clinical context. The readership of the journal closely reflects its multi-disciplinary contents, being a balance of scientists, engineers and clinicians.
The contents are in the form of research papers, brief reports, review papers and correspondence, whilst special interest issues and supplements are published from time to time.
Disciplines covered include biomechanics and mechanobiology at all scales, bioengineering and use of tissue engineering and biomaterials for clinical applications, biophysics, as well as biomechanical aspects of medical robotics, ergonomics, physical and occupational therapeutics and rehabilitation.