کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10431763 | 910226 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Kinetic and kinematic adjustments during perturbed walking across visible and camouflaged drops in ground level
ترجمه فارسی عنوان
تنظیمات جنبشی و سینماتیکی در هنگام راه رفتن مبهم در قطره های قابل مشاهده و محکم در سطح زمین
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کلمات کلیدی
بیومکانیک، راه رفتن، پوسیدگی، زمین ناهموار،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
چکیده انگلیسی
Walking in even the most familiar environment posesses a challenge to humans due to continuously changing surface conditions such as compliance, slip, or level. These changes can be visible or invisible due to camouflage. In order to prevent falling, camouflaged changes in the ground level in particular require a quick response of the locomotor system. For ten subjects we investigated kinematics and ground reaction forces of two consecutive contacts while they were walking across visible (drops of 0, â5 and â10Â cm at second contact) and camouflaged (drops of 0 or â5Â cm, and drops of 0 or â10Â cm at second contact) changes in the ground level. For both situations we found significant kinetic and kinematic adjustments during the perturbed second contact but also one step earlier, in the preparatory first contact. During walking across visible changes in the ground level, second peak ground reaction force at first contact decreased whereas the drop height increased at the second contact. In addition, at the end of this first contact the ankle and knee were more flexed and the trunk was more erect compared to level walking. During the perturbed second contact, first peak ground reaction force increased with drop height, whereas kinematic adjustments at touchdown were less. The visual perception of the perturbation facilitated prior adaptations. During walking across camouflaged changes in ground level such a visually guided preadaptation was not possible and the adaptations prior to the perturbation were less than those observed during walking across visible changes in the ground. However, when stepping into a camouflaged drop, the kinetic and kinematic adjustments became more obvious and they increased with increasing camouflaged drop height.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 47, Issue 10, 18 July 2014, Pages 2286-2291
Journal: Journal of Biomechanics - Volume 47, Issue 10, 18 July 2014, Pages 2286-2291
نویسندگان
Roy Müller, Kevin Tschiesche, Reinhard Blickhan,