Hilgevoord A A, Koelman J H, Bour L J, Ongerboer de Visser B W
Graduate School of Neurosciences Amsterdam, Division of Clinical Neurophysiology (D2), The Netherlands.
Electroencephalogr Clin Neurophysiol. 1994 Jun;93(3):202-8. doi: 10.1016/0168-5597(94)90041-8.
We examined soleus H-reflex recruitment in 30 controls and 33 patients with spinal cord lesions and spastic spinal paresis. H-reflex gain and threshold were determined from recruitment curves after normalization of stimulus intensity as a multiple of the current for a threshold M-response. Reflex gain was expressed as the mean slope of the H-reflex recruitment curve up to the half-maximal response size. Up to this point the curve follows an almost linear trajectory and will mainly reflect Ia afferent stimulation. This slope had a large variability but was clearly correlated with the H/M ratio. The mean gain was equal in controls and patients. The relation between H- and M-thresholds was expressed as a ratio which had a lower mean value in the patients. Though both H- and M-thresholds may be influenced by peripheral factors, this lower ratio suggests an increase in spinal motoneuron excitability in patients.
我们检测了30名对照者以及33名患有脊髓损伤和痉挛性脊髓轻瘫患者的比目鱼肌H反射募集情况。在将刺激强度标准化为阈下M波电流倍数后，根据募集曲线确定H反射增益和阈值。反射增益表示为H反射募集曲线直至半最大反应幅度的平均斜率。在此之前，曲线几乎呈线性轨迹，主要反映Ia传入纤维刺激。该斜率变化很大，但与H/M比值明显相关。对照组和患者的平均增益相等。H阈值与M阈值之间的关系用比值表示，患者的该比值平均值较低。虽然H阈值和M阈值都可能受外周因素影响，但该较低的比值表明患者脊髓运动神经元兴奋性增加。
