کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8799835 | 1604175 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Variability in center of pressure position and muscle activation during walking with chronic ankle instability
ترجمه فارسی عنوان
تغییر در مرکز فشار و فعال شدن عضلات هنگام راه رفتن با بی ثبات مچ پا
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کلمات کلیدی
پیچ خوردگی مچ پا، فشار پاستار، الکترومیوگرافی، راه رفتن،
موضوعات مرتبط
علوم پزشکی و سلامت
پزشکی و دندانپزشکی
ارتوپدی، پزشکی ورزشی و توانبخشی
چکیده انگلیسی
Chronic ankle instability (CAI) patients exhibit altered gait mechanics. The objective was to identify differences in stride-to-stride variability in the position of the center of pressure (COP) and muscle activity during walking between individuals with and without CAI. Participants (17 CAI;17 Healthy) walked on a treadmill at 1.3â¯m/s while surface electromyography (sEMG) of the fibularis longus (FL) and plantar pressure were recorded. The medial-lateral COP position was averaged for each 10% interval of stance and group standard deviations (SD), coefficient of variation (COV), and range for the COP position were compared between groups via independent t-tests. Ensemble curves for sEMG amplitude SD were graphed for the entire stride cycle to determine significant differences. The CAI group had increased COP position variability (SD (CAIâ¯=â¯0.79â¯Â±â¯0.47â¯mm, Controlâ¯=â¯0.48â¯Â±â¯0.17â¯mm), COV (CAIâ¯=â¯1.47â¯Â±â¯0.87â¯mm, Controlâ¯=â¯0.93â¯Â±â¯0.33â¯mm), range (CAIâ¯=â¯2.97â¯Â±â¯2.07â¯mm, Controlâ¯=â¯1.72â¯Â±â¯0.33â¯mm, Pâ¯<â¯.05 for all analyses)) during the first 10% of stance. The CAI group had lower FL sEMG amplitude variability from 1 to 10% (mean differenceâ¯=â¯0.014â¯Â±â¯0.006), 32-38% (mean differenceâ¯=â¯0.013â¯Â±â¯0.004) and 56-100% (mean differenceâ¯=â¯0.026â¯Â±â¯0.01) of the gait cycle. Increased COP variability at initial contact may increase risk of lateral ankle sprains in CAI patients. Decreased sEMG amplitude variability may indicate a constrained sensorimotor system contributing to an inability to adapt to changing environmental demands.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electromyography and Kinesiology - Volume 38, February 2018, Pages 155-161
Journal: Journal of Electromyography and Kinesiology - Volume 38, February 2018, Pages 155-161
نویسندگان
Rachel M. Koldenhoven, Mark A. Feger, John J. Fraser, Jay Hertel,