Department of Biomedical Engineering, School of Medicine, Keimyung University, 1095 Dalgubeol-daero, Daegu 42601, Korea.
Department of Physical Therapy, Nambu University, 23 Cheomdanjungang-ro, Gwangju 62271, Korea.
Medicina (Kaunas). 2022 May 27;58(6):716. doi: 10.3390/medicina58060716.
: The Hoffmann's reflex (H-reflex) is important in electrodiagnostic testing because it improves sensitivity and specificity in diagnosing radiculopathies. Although quantitative electromyography (EMG) measurements for H-reflex amplitudes during the gait cycle have been performed in both hemiplegic and healthy individuals, research on the H-wave latency in these individuals during the gait cycle is lacking. : The H-reflex latency of the soleus muscle was investigated in hemiplegic stroke patients and healthy elderly persons in this observational analytical study. Two groups of individuals participated in this study: healthy adults ( = 25) and stroke patients with hemiplegia ( = 25) were compared. An MP150 with Ag-Ag/Cl electrodes was utilized to record and analyse electromyography measurements. All individuals could walk independently indoors. Stimuli were administered to elicit the H-reflex in the four gait phases as the participant walked. : Stroke patients had a significantly shorter latency than did healthy patients in the mid-swing, mid-stance, and toe-off phases of the gait cycle; heel-strike latency did not significantly differ. : These results can be used as diagnostic data to help account for patient characteristics or measure the recovery extent for treatment planning and gait training in hemiplegic individuals.
霍夫曼反射（H 反射）在电诊断测试中很重要，因为它可以提高神经根病变的敏感性和特异性。虽然在偏瘫和健康个体的步态周期中已经对 H 反射幅度进行了定量肌电图（EMG）测量，但在这些个体的步态周期中，H 波潜伏期的研究还很缺乏。
在这项观察性分析研究中，我们研究了偏瘫卒中患者和健康老年人的比目鱼肌 H 反射潜伏期。两组个体参与了这项研究：健康成年人（n=25）和偏瘫卒中患者（n=25）进行了比较。使用 MP150 结合 Ag-Ag/Cl 电极来记录和分析肌电图测量值。所有个体都可以在室内独立行走。在参与者行走时，在四个步态阶段给予刺激以引出 H 反射。
卒中患者在步态周期的中间摆动、中间站立和脚趾离地阶段的潜伏期明显短于健康患者；而在足跟触地阶段，潜伏期没有显著差异。
这些结果可作为诊断数据，有助于解释患者特征或衡量偏瘫个体的治疗计划和步态训练的恢复程度。
