The weak relationship between ankle proprioception and gait speed after stroke a robotic assessment study

📄 arXiv: 2402.11110v1 📥 PDF

作者: Christopher A. Johnson, Piyashi Biswas, Rubi Tapia, Jill See, Lucy Dodakian, Vicky Chan, Po T. Wang, Zoran Nenadic, An H. Do, David J. Reinkensmeyer

分类: cs.RO

发布日期: 2024-02-16


💡 一句话要点

通过机器人评估揭示中风后踝关节本体感觉与步态速度的弱关系

🎯 匹配领域: 支柱一:机器人控制 (Robot Control)

关键词: 踝关节本体感觉 中风康复 机器人评估 步态分析 运动障碍

📋 核心要点

  1. 现有研究对踝关节本体感觉与步态速度之间的关系存在争议,评估方法的变异性可能是主要原因。
  2. 本文采用机器人评估技术,使用两种不同的测试方法量化踝关节本体感觉,以提高评估的一致性和敏感性。
  3. 研究结果表明,踝关节本体感觉与步态速度之间存在弱相关性,且与下肢运动障碍无显著相关性,强调了本体感觉在步态控制中的作用。

📝 摘要(中文)

踝关节本体感觉缺陷在中风后常见,并且与踝关节运动障碍独立存在。尽管一些研究发现踝关节本体感觉缺陷可以预测步态功能,但其他研究未能找到这种关系,可能是由于本体感觉评估的变异性。本文使用机器人评估方法,量化了39名慢性中风患者的踝关节本体感觉,并分析了其与步态速度及下肢运动障碍之间的关系。结果显示,87%的参与者存在踝关节本体感觉障碍,踝关节本体感觉与6分钟步行测试的步态速度呈弱相关,但与下肢运动障碍无显著相关性,确认了踝关节本体感觉与步态之间的弱关系。

🔬 方法详解

问题定义:本研究旨在探讨中风后踝关节本体感觉缺陷与步态速度之间的关系,现有方法在评估本体感觉时存在一致性和敏感性不足的问题。

核心思路:通过使用机器人技术进行踝关节本体感觉的量化评估,提供更为一致和敏感的测量手段,以揭示其与步态功能的关系。

技术框架:研究采用了两种机器人测试方法(关节位置再现和交叉测试),对39名慢性中风患者的踝关节本体感觉进行评估,并与步态速度和下肢运动障碍进行相关性分析。

关键创新:本研究的创新点在于使用机器人评估技术,克服了传统评估方法的局限性,提供了更为可靠的本体感觉测量结果。

关键设计:在评估过程中,采用了关节位置再现(JPR)和交叉测试两种方法,结合6分钟步行测试(6MWT)和10米步行测试(10mWT)进行步态速度的测量,同时评估下肢运动障碍的相关指标。

📊 实验亮点

实验结果显示,87%的参与者存在踝关节本体感觉障碍,踝关节本体感觉的敏感性评估与6分钟步行测试的步态速度呈弱相关(ρ = -0.34, p = 0.039),而与10米步行测试无显著相关性(ρ = -0.29, p = 0.08)。

🎯 应用场景

该研究为中风患者的康复提供了新的评估工具,机器人评估技术可以更准确地量化本体感觉缺陷,从而为个性化康复方案的制定提供依据。未来,该方法有望在临床实践中广泛应用,帮助改善中风患者的步态功能。

📄 摘要(原文)

Ankle proprioceptive deficits are common after stroke and occur independently of ankle motor impairments. Despite this independence, some studies have found that ankle proprioceptive deficits predict gait function, consistent with the concept that somatosensory input plays a key role in gait control. Other studies, however, have not found a relationship, possibly because of variability in proprioception assessments. Robotic assessments of proprioception offer improved consistency and sensitivity. Here we relationships between ankle proprioception, ankle motor impairment, and gait function after stroke using robotic assessments of ankle proprioception. We quantified ankle proprioception using two different robotic tests (Joint Position Reproduction and Crisscross) in 39 persons in the chronic phase of stroke. We analyzed the extent to which these robotic proprioception measures predicted gait speed, measured over a long distance (6-minute walk test) and a short distance (10-meter walk test). We also studied the relationship between robotic proprioception measures and lower extremity motor impairment, quantified with measures of ankle strength, active range of motion, and the lower extremity Fugl-Meyer exam. Impairment in ankle proprioception was present in 87% of the participants. Ankle proprioceptive acuity measured with JPR was weakly correlated with 6MWT gait speed (\r{ho} = -0.34, p = 0.039) but not 10mWT (\r{ho} = -0.29, p = 0.08). Ankle proprioceptive acuity was not correlated with lower extremity motor impairment (p > 0.2). These results confirm the presence of a weak relationship between ankle proprioception and gait after stroke that is independent of motor impairment.