@article{ref1,
title="Relationship between postural stability and fall risk in elderly people with lumbar spondylosis during local vibratory stimulation for proprioception: a retrospective study",
journal="Somatosensory and motor research",
year="2020",
author="Ito, Tadashi and Sakai, Yoshihito and Nishio, Reiya and Ito, Yohei and Yamazaki, Kazunori and Morita, Yoshifumi",
volume="ePub",
number="ePub",
pages="ePub-ePub",
abstract="<b>Purpose:</b> Reduced proprioception affects fall risks in elderly people with lumbar spondylosis. The decrease in proprioception in the trunk or lower legs may contribute to a decline in postural stability. We aimed to investigate the association between proprioceptive postural stability and fall risks in elderly individuals with lumbar spondylosis.<b>Materials and Methods:</b> In this retrospective study, the centre-of-pressure displacement was determined in elderly individuals with lumbar spondylosis during upright stance while standing on a Wii Balance Board with their eyes closed (fall-risk group, <i>n</i> = 55; non-fall-risk group, <i>n</i> = 60). Vibratory stimulations at 30 Hz were applied to the lumbar multifidus and gastrocnemius to evaluate the relative contributions of proprioceptive signals used in postural control (relative proprioceptive weighting ratio).<b>Results:</b> Compared with the non-fall-risk group, the fall-risk group displayed a high relative proprioceptive weighting ratio (<i>p</i> = 0.024). Relative proprioceptive weighting ratio (odds ratio, 1.1; 95% confidence interval: 1.004-1.109) was independently associated with fall risks after adjusting for confounding factors. Among variables related to fall risk, the relative proprioceptive weighting ratio was a significant factor (<i>p</i> < 0.035).<b>Conclusion:</b> The fall-risk group of elderly individuals with lumbar spondylosis was dependent on the ankle strategy. The fall risk in elderly people with lumbar spondylosis could be due to over-dependence on the input from muscle spindles in the gastrocnemius.<p /> <p>Language: en</p>",
language="en",
issn="0899-0220",
doi="10.1080/08990220.2020.1756243",
url="http://dx.doi.org/10.1080/08990220.2020.1756243"
}