Margins of stability in young adults with traumatic transtibial amputation walking in destabilizing environments

JOURNAL OF BIOMECHANICS

卷:47

Article

Beltran, Eduardo J.¹  Dingwell, Jonathan B.²  Wilken, Jason M.¹ 

[1] Brooke Army Med Ctr, Dept Orthopaed & Rehabil, Ctr Intrepid, Ft Sam Houston, TX 78234 USA

[2] Univ Texas Austin, Dept Kinesiol & Hlth Educ, Austin, TX 78712 USA

关键词: Walking;    Transtibial amputation;    Perturbations;    Lateral stability;    Center of mass;   

DOI  :  10.1016/j.jbiomech.2013.12.011

来源: Elsevier

【 摘 要 】

Understanding how lower-limb amputation affects walking stability, specifically in destabilizing environments, is essential for developing effective interventions to prevent falls. This study quantified mediolateral margins of stability (MOS) and MOS sub-components in young individuals with traumatic unilateral transtibial amputation (TTA) and young able-bodied individuals (AB). Thirteen AB and nine TTA completed five 3-min walking trials in a Computer Assisted Rehabilitation ENvironment (CAREN) system under each of three test conditions: no perturbations, pseudo-random mediolateral translations of the platform, and pseudo-random mediolateral translations of the visual field. Compared to the unperturbed trials, TTA exhibited increased mean MOS and MOS variability during platform and visual field perturbations (p < 0.010). AB exhibited increased mean MOS during visual field perturbations and increased MOS variability during both platform and visual field perturbations (p < 0.050). During platform perturbations, TTA exhibited significantly greater values than AB for mean MOS (p < 0.050) and MOS variability (p < 0.050); variability of the lateral distance between the center of mass (COM) and base of support at initial contact (p < 0.005); mean and variability of the range of COM motion (p < 0.010); and variability of COM peak velocity (p < 0.050). As determined by mean MOS and MOS variability, young and otherwise healthy individuals with transtibial amputation achieved lateral stability similar to that of their able-bodied counterparts during unperturbed and visually-perturbed walking. However, based on mean and variability of MOS, unilateral transtibial amputation was shown to have affected lateral walking stability during platform perturbations. Published by Elsevier Ltd.

【 授权许可】

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