کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6207878 1265666 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anticipatory postural adjustments contribute to age-related changes in compensatory steps associated with unilateral perturbations
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
پیش نمایش صفحه اول مقاله
Anticipatory postural adjustments contribute to age-related changes in compensatory steps associated with unilateral perturbations
چکیده انگلیسی

Compensatory steps are essential for preventing falls following perturbations. This study aimed to explore age-related changes in compensatory steps to unilateral perturbations, specifically in terms of whether anticipatory postural adjustments (APAs) play a role in stabilizing lateral balance. Five young and five elderly male adults participated. The split-belt treadmill was used to provide bi- and unilateral perturbations, as forward or backward transitions, applied 10 times in random order. Backward steps evoked by unilateral forward perturbations were evaluated. We measured temporal characteristics, mediolateral (ML) center of mass (COM) motion, and ML step length of compensatory steps. Compensatory steps to unexpected perturbations showed delayed onset of foot-off (FO) and expanded lateral swing length in elderly compared to young subjects. Differences in COM motions and step width arose related to APAs. Elderly subjects showing APAs exhibited no significant differences in ML COM, ML COM velocity, or ML swing length compared to young subjects. However, elderly subjects without APAs showed significant changes toward instability in these parameters. The fact that APAs play a notable role, particularly in the elderly, in stability offers a new insight into preventing falls. However, APAs occurred in 29% of the steps of young and 35% of the steps of elderly subjects. If the occurrence of APAs in elderly people in response to compensatory steps was more frequent, fall risk would be reduced. Further studies, particularly into APA frequency, might contribute to improved intervention to prevent falls.

► We explored age-related changes in the role of anticipatory postural adjustments (APAs) on compensatory steps. ► Backward steps evoked by unilateral forward perturbations were evaluated in elderly and young subjects. ► Elderly subjects without APAs showed significant changes toward instability. ► The fact that APAs play a notable role, particularly in the elderly, in stability offers a new insight into preventing falls.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gait & Posture - Volume 36, Issue 3, July 2012, Pages 625-630
نویسندگان
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