Velázquez-Pérez L, Sánchez-Cruz G, Pérez-González R M
Servicio de Neurofisiología Clínica; Hospital Docente Provincial Vladimir Ilich Lenin, Holguín, Cuba.
Rev Neurol. 2002;34(9):819-23.
Lumbosacral radicular compression syndrome is a disorder that can affect anyone at some moment in their lives, regardless of their sex, age and profession. It appears more frequently in specific groups of people. Late responses constitute neurophysiological studies that allow evaluation of the functional state of the proximal portions of the peripheral nervous system, which are affected to a greater or lesser extent in the course of this pathological state. AIMS. To determine the usefulness of the F wave and H reflex in lumbosacral compressive radiculopathies at L5 and S1.
We examined 100 patients who had been clinically and imagenologically diagnosed as suffering from lumbosacral compressive radiculopathy, which was classified as being L5 and S1. Late responses (F wave and H reflex) were performed and they were compared with a group made up of 74 normal subjects.
In patients with L5 radiculopathy, the F wave was abnormal in 66.6% of the cases, where a reduction in the percentage of waves obtained from patients and prolonged minimum, average and maximum latencies predominated. In the case of patients with S1 lumbosacral compressive radiculopathies, 77.5% presented H reflex alterations and the main abnormalities were detected as being the prolongation of reduced amplitude latencies and the absence of response.
The F wave and H reflex are useful tools for evaluating patients with compressive radiculopathies at L5 and S1, respectively.
腰骶神经根压迫综合征是一种在任何人的生命中的某个时刻都可能发生的疾病，无论其性别、年龄和职业如何。它在特定人群中更为常见。迟发反应是一种神经生理学研究，可用于评估外周神经系统近端部分的功能状态，在这种病理状态下，该部分会或多或少地受到影响。目的：确定F波和H反射在L5和S1腰骶部压迫性神经根病中的作用。
我们检查了100例经临床和影像学诊断为腰骶部压迫性神经根病的患者，该病被分类为L5和S1。进行了迟发反应（F波和H反射）检查，并将其与由74名正常受试者组成的对照组进行比较。
在L5神经根病患者中，66.6%的病例F波异常，主要表现为患者引出波的百分比降低以及最小、平均和最大潜伏期延长。在S1腰骶部压迫性神经根病患者中，77.5%出现H反射改变，主要异常表现为波幅降低潜伏期延长和无反应。
F波和H反射分别是评估L5和S1压迫性神经根病患者的有用工具。
