کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1096631 1487468 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Whole-body vibration alters proprioception in the trunk
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Whole-body vibration alters proprioception in the trunk
چکیده انگلیسی

Occupational whole-body vibration has long been associated with low back injuries. However, the mechanism of these injuries is not well understood. In this paper, the effect of whole-body vibration on proprioception and dynamic stability was examined. Subjects exposed to 20 min of vertical, seated, whole-body vibration were found to have a 1.58-fold increase in position-sense errors after vibration relative to controls exposed to 20 min of the same seated posture without vibration exposure. To understand the potential effect of a sensory loss on dynamic low back stability, a lumped parameter model of the trunk and neuromotor response was created. Using this model, an increase in the threshold of the sensory system was predicted to increase trunk flexion and delay neuromotor response with a sudden, unexpected perturbation. These predictions were demonstrated in a second experiment where subjects exhibited both an 11.9% increase in trunk flexion and an 11.2% increase in time to peak paraspinal muscle response (measured using integrated electromyographic activity) after exposure to 20 min of vertical, seated, whole-body vibration.Relevance to IndustryFor workers exposed to whole-body vibration (WBV), this research suggests that a loss in the ability to sense and control lumbar posture may occur. After exposure, unexpected perturbations during manual materials handling could lead to injury. Reducing vibration exposure or a break between exposure and manual materials handling could be used to reduce this risk.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Industrial Ergonomics - Volume 38, Issues 9–10, September–October 2008, Pages 792–800
نویسندگان
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