国际标准期刊号: 2329-9096
纳格拉·侯赛因、埃玛姆·穆罕默德、埃哈卜·埃尔扎瓦维
目的:分析正常人群正中、尺侧CMAP的形态、波幅,分析正常尸体手小肌的解剖神经分布。
设计:横断面研究。
地点:亚历山大大学门诊部和解剖学系。
参与者:300 名正常成年人(82 名男性和 218 名女性)和 30 具正常成人尸体。
主要结果指标:对正常受试者的正中神经和尺神经进行运动传导研究。分别从大鱼际和小鱼际肌肉表面记录 CMAP,并分析波形形状和幅度。
对于所包括的正常尸体,解剖了大鱼际和小鱼际肌肉的神经供应。记录主要神经干(正中或尺神经)、分支数量、大小以及进入肌肉的部位。
结果:研究人群的平均年龄为 37.86 ± 8.83(年龄范围 19-69)。正中神经的平均振幅显着高于尺神经的平均振幅(分别为11.785±5.0、10.45±2.96,p=0.0001)。正中神经的平均远端潜伏期显着高于尺神经(分别为3.38±0.41和2.698±0.40,p=0.0001)。
The median nerve had mostly dome shaped CMAP rather than double peaked CMAP with significant difference (p=0.0001), while the shape of CMAP of the ulnar nerve was more frequently double peaked rather than dome shaped with significant difference (p=0.0001). The mean distal latency of the median nerve was significantly longer in those with dome shaped CMAP rather than those with double peak CMAP (p=0.002). Similarly, the mean distal latency of the ulnar nerve was significantly longer in those with dome shaped CMAP compared with those with double peak CMAP (p=0.0001). There were no statistical significant differences between the amplitude of dome shaped CMAP and the double peaked CMAP in either the median or the ulnar nerve.
解剖结果显示,90%的标本中拇短展肌由正中神经支配,10%由双神经支配。小指短展肌90%由尺神经深支支配,10%由尺神经浅支支配。50% 的标本中正中神经和尺神经之间存在联系。
结论:正中神经CMAP形态多为圆顶形,尺神经CMAP形态多为双峰形。手部小肌肉神经支配模式的变异可能是一个可能的病因。