Digital Human Research Team, Artificial Intelligence Research Center, National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064, Japan.
Department of Functional Joint Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan.
Sensors (Basel). 2021 Jun 10;21(12):4009. doi: 10.3390/s21124009.
Small knee flexion motion is a characteristic of gait in individuals with knee osteoarthritis. This study examined the relationship between knee flexion excursion in loading response and knee self-perception in individuals with knee osteoarthritis. Twenty-one individuals with knee osteoarthritis participated in this study. Knee flexion excursions in loading response while walking at a comfortable and a fast-walking speed were measured using an inertial measurement unit-based motion capture system. The degree of knee perceptual impairment was evaluated using the Fremantle Knee Awareness Questionnaire (FreKAQ). The relationships between the FreKAQ score and gait variables and knee function were evaluated by calculating the correlation coefficient. The unique contributions of knee self-perception and muscle strength to knee flexion excursion in loading response were analyzed using hierarchical linear regression. Knee self-perception was significantly correlated with pain during walking, muscle strength and knee flexion excursion at fast speed. In the fast speed condition only, impaired knee self-perception was inversely proportional to knee flexion excursion and accounted for 21.8% of the variance in knee flexion excursion. This result suggests that impaired self-perception of the knee may help to explain the decrease in the knee flexion excursion in the loading response in individuals with knee osteoarthritis.
膝关节小角度屈曲运动是膝骨关节炎患者步态的一个特征。本研究旨在探讨膝骨关节炎患者在负荷反应中膝关节屈曲伸展程度与膝关节自我感知之间的关系。21 名膝骨关节炎患者参与了本研究。采用基于惯性测量单元的运动捕捉系统测量了患者在舒适和快速步行速度下行走时的膝关节在负荷反应中的屈曲伸展程度。使用 Fremantle 膝关节感知问卷（FreKAQ）评估膝关节感知障碍程度。通过计算相关系数评估 FreKAQ 评分与步态变量和膝关节功能之间的关系。使用分层线性回归分析膝关节自我感知和肌肉力量对膝关节在负荷反应中的屈曲伸展程度的独特贡献。膝关节自我感知与行走时的疼痛、肌肉力量和快速行走时的膝关节屈曲伸展程度显著相关。仅在快速行走速度下，膝关节自我感知受损与膝关节屈曲伸展程度呈反比，占膝关节屈曲伸展程度变异的 21.8%。这一结果表明，膝关节自我感知受损可能有助于解释膝骨关节炎患者在负荷反应中膝关节屈曲伸展程度的降低。
