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
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 1.3 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 (CAI = 0.79 ± 0.47 mm, Control = 0.48 ± 0.17 mm), COV (CAI = 1.47 ± 0.87 mm, Control = 0.93 ± 0.33 mm), range (CAI = 2.97 ± 2.07 mm, Control = 1.72 ± 0.33 mm, P < .05 for all analyses)) during the first 10% of stance. The CAI group had lower FL sEMG amplitude variability from 1 to 10% (mean difference = 0.014 ± 0.006), 32-38% (mean difference = 0.013 ± 0.004) and 56-100% (mean difference = 0.026 ± 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
نویسندگان
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