Variability measures of trunk and pelvis acceleration during walking and quiet stance are related in patients with multiple sclerosis and in healthy controls

نویسندگان

  • Jessie M. Huisinga
  • Rebecca J. St. George
  • Fay B. Horak
چکیده

INTRODUCTION Postural control is essential for any movement task, but postural control strategies during one task in a specific environment may not generalize to another task or situation [1]. Thus, it is difficult to identify common postural control mechanisms across tasks. Control of balance during walking and during quiet standing likely involve both overlapping and independent control systems since walking differs from standing in that the center of mass is constantly moving beyond the base of support [2]. A set of common measures which can be used in gait and in balance tasks to classify postural control across tasks would allow for a better understanding of how postural control is regulated according to task conditions. Thus, the purpose of this study was to apply the same set of variables to measure postural control during steady state walking and during quiet stance. We used body-worn inertial sensors, which could be used in a clinic setting, to identify acceleration measures that reflecting postural control. Both healthy controls and persons with multiple sclerosis (MS) were examined to identify whether the measures are robust enough to identify differences in postural control between controls and very mildly-affected MS subjects. It was hypothesized that variability of the acceleration patterns of the pelvis and the trunk would be related between walking and standing tasks and that there would be differences in variability of acceleration between groups.

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تاریخ انتشار 2011