Rehabilitation Sciences Graduate Program, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, Brazil.
Movement Analysis and Rehabilitation Laboratory, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, Brazil.
Sensors (Basel). 2021 Jan 29;21(3):921. doi: 10.3390/s21030921.
The main purpose of the present study was to assess the effects of foot drop stimulators (FDS) in individuals with stroke by means of spatio-temporal and step-to-step symmetry, harmonic ratio (HR), parameters obtained from trunk accelerations acquired using a wearable inertial sensor. Thirty-two patients (age: 56.84 ± 9.10 years; 68.8% male) underwent an instrumental gait analysis, performed using a wearable inertial sensor before and a day after the 10-session treatment (PRE and POST sessions). The treatment consisted of 10 sessions of 20 min of walking on a treadmill while using the FDS device. The spatio-temporal parameters and the HR in the anteroposterior (AP), vertical (V), and mediolateral (ML) directions were computed from trunk acceleration data. The results showed that time had a significant effect on the spatio-temporal parameters; in particular, a significant increase in gait speed was detected. Regarding the HRs, the HR in the ML direction was found to have significantly increased (+20%), while those in the AP and V directions decreased (approximately 13%). Even if further studies are necessary, from these results, the HR seems to provide additional information on gait patterns with respect to the traditional spatio-temporal parameters, advancing the assessment of the effects of FDS devices in stroke patients.
本研究的主要目的是通过使用可穿戴惯性传感器获取的躯干加速度来评估足下垂刺激器 (FDS) 对中风患者的时空和步幅对称性、谐波比 (HR) 等参数的影响。32 名患者（年龄：56.84±9.10 岁；68.8%为男性）接受了一项使用可穿戴惯性传感器进行的仪器步态分析，在 10 次治疗的前后（PRE 和 POST 阶段）进行。治疗包括在跑步机上行走 20 分钟，同时使用 FDS 设备，共进行 10 次。从躯干加速度数据中计算出前-后（AP）、垂直（V）和横-侧向（ML）方向的时空参数和 HR。结果表明，时间对时空参数有显著影响；特别是，检测到步态速度显著增加。关于 HRs，发现 ML 方向的 HR 显著增加（+20%），而 AP 和 V 方向的 HR 则降低（约 13%）。尽管还需要进一步的研究，但从这些结果来看，HR 似乎比传统的时空参数提供了关于步态模式的更多信息，从而推进了对中风患者 FDS 设备效果的评估。
