Purpose: 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.

Materials and Methods: 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, n = 55; non-fall-risk group, n = 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).

Results: Compared with the non-fall-risk group, the fall-risk group displayed a high relative proprioceptive weighting ratio (p = 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 (p < 0.035).

Conclusion: 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.

目的：本体感觉降低会影响老年腰椎病患者的跌倒风险。躯干或小腿本体感觉的下降可能导致姿势稳定性下降。我们旨在调查老年腰椎病患者本体感觉姿势稳定性与跌倒风险之间的关联。

材料和方法：在这项回顾性研究中，腰椎病老年人在直立站立时闭眼站在 Wii 平衡板上测定压力中心位移（跌倒风险组，n  = 55；非跌倒风险组，n  = 60）。将 30 Hz 的振动刺激应用于腰椎多裂肌和腓肠肌，以评估用于姿势控制的本体感受信号的相对贡献（相对本体感受权重比）。

结果：与非跌倒风险组相比，跌倒风险组显示出较高的相对本体感受权重比（p  = 0.024）。在调整混杂因素后，相对本体感受权重比（优势比，1.1；95% 置信区间：1.004-1.109）与跌倒风险独立相关。在与跌倒风险相关的变量中，相对本体感受权重比是一个重要因素（p  < 0.035）。

结论：老年腰椎病患者跌倒风险组依赖于踝关节策略。患有腰椎病的老年人的跌倒风险可能是由于过度依赖腓肠肌肌梭的输入。