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KMID : 1101520180220010001
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Journal of Korean Society for Neurotherapy
2018 Volume.22 No. 1 p.1 ~ p.5
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Age-related Control Strategies to Execute the First Step from Standing in Older Adults
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Ko Man-Soo
Cole Matthew
Vinyard Rachel
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Abstract
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Purpose: The purpose of this study was to identify the effect of aging on the dynamic balance of gait initiation (GI) between healthy elderly adults and young adults.
Methods: This study used descriptive analysis. Total 17 subjects, 8 healthy elderly and 9 young adults were recruited from the local community, San Angelo, Texas. EMG sensors (Biometrics Ltd., Ladysmith, VA, USA) were attached to the TA and Sol muscles bilaterally to measure peak amplitude and time to peak amplitude. Subjects were instructed to stand comfortably while barefoot on the High Resolution (HR) mat (Tekscan Inc., South Boston, MA, USA) to assess 1) COP anterior-posterior excursion, 2) COP medial-lateral excursion, 3) COP area, 3) COP backward motion distance, 4) COP motion to swing limb distance. The subjects were then given a verbal cue to start walking from a quiet standing.
Results: The healthy young group illustrated greater lateral and backward movement of COP as well as COP A-P and L-R excursion than the elderly group. In addition, the healthy young group showed greater peak amplitude of bilateral TA muscles during GI. Time to peak TA muscle amplitude was much faster in the healthy young group than the elderly group during GI.
Conclusion: The limited dynamic balance observed in the elderly group compared to healthy young adults during the task of GI. This finding suggests that sway analysis during GI could be used as a screening tool to identify the impaired dynamic balance for people who present balance deficits.
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KEYWORD
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Age-related control, older adults, dynamic balance, gait initiation, EMG
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