کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4055773 1603847 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Time dependent structure of postural sway in individuals with multiple sclerosis
ترجمه فارسی عنوان
ساختار وابسته به زمان وابستگی موضعی در افراد مبتلا به مولتیپل اسکلروزیس
کلمات کلیدی
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
چکیده انگلیسی


• Postural control was examined in a minimally impaired sample of persons with MS.
• Approximate entropy measures identified differences undetected by velocity.
• Impairment in the MS sample was only in the mediolateral direction.
• Complexity measures have high utility in detecting subtle impairments in posture.

Non-linear analyses, which examine the time dependent structure of physiological output have been found to be able to detect subtle differences in postural control between pathological groups and healthy controls while traditional linear parameters do not. This investigation examines whether a specific non-linear metric, approximate entropy, may provide a novel biomarker for balance impairment in individuals with multiple sclerosis (MS) who have normal sway. This analysis included a sample of 30 individuals with MS with normal postural sway and 36 controls. Participants stood on a force platform for two trials of 30 s with eyes open. Postural control was indexed by sway area, mean velocity along the antero-posterior (AP) and mediolateral (ML) axis. The time dependent structure of the COP along the AP and ML axes was indexed with approximate entropy (ApEnAP; ApEnML). T-tests and Mann–Whitney U tests were utilized to analyze differences between groups. Per design there were no differences in sway area between the MS and control groups. Additionally, there were no differences in sway velocity. The MS group had lower ApEnML values compared to the control group (U = 376, p = .026). The results indicate that individuals with MS who have normal sway area had greater time dependent structure in ML sway. This investigation highlights the utility of non-linear analyses when assessing balance impairment in MS samples that present with minimal sway area.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gait & Posture - Volume 48, July 2016, Pages 19–23
نویسندگان
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