کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4050274 1264919 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three-dimensional joint reaction forces and moments at the low back during over-ground walking in persons with unilateral lower-extremity amputation
ترجمه فارسی عنوان
نیروهای واکنش مشترک سه بعدی و لحظات کم پشت در طول راه رفتن بیش از حد زمین در افراد با قطع عضو یک طرفه پایین اندام
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
چکیده انگلیسی

BackgroundAbnormal mechanics of locomotion following lower-extremity amputation are associated with increases in trunk motion, which in turn may alter loads at the low back due to changes in inertial and gravitational demands on the spine and surrounding trunk musculature.MethodsOver-ground gait data were retrospectively compiled from two groups walking at similar self-selected speeds (~ 1.35 m/s): 40 males with unilateral lower-extremity amputation (20 transtibial, 20 transfemoral) and 20 able-bodied male controls. Three-dimensional joint reaction forces and moments at the low back (L5/S1 spinal level) were calculated using top-down and bottom-up approaches. Peak values and the timings of these were determined and compared between and within (bilaterally) groups, and secondarily between approaches.FindingsPeak laterally-directed joint reaction forces and lateral bend moments increased with increasing level of amputation, and were respectively 83% and 41% larger in prosthetic vs. intact stance among persons with transfemoral amputation. Peak anteriorly-directed reaction forces and extension moments were 31% and 55% larger, respectively, among persons with transtibial amputation compared to controls. Peak vertical reaction forces and axial twist moments were similar between and within groups. Peak joint reaction forces and moments were larger (3–14%), and the respective timing of these sooner (11–62 ms), from the bottom-up vs. top-down approach.InterpretationIncreased and asymmetric peak reaction forces and moments at the low back among persons with unilateral lower-extremity amputation, particularly in the frontal plane, suggest potential mechanistic pathways through which repeated exposure to altered trunk motion and spinal loading may contribute to low-back injury risk among persons with lower-extremity amputation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Clinical Biomechanics - Volume 29, Issue 3, March 2014, Pages 235–242
نویسندگان
, ,