Weiss I P, Schiff S J
Department of Neurology, Children's National Medical Center, Washington, D.C.
J Neurosurg. 1993 Sep;79(3):346-53. doi: 10.3171/jns.1993.79.3.0346.
The variability of reflex responses during selective dorsal rhizotomy was studied in eight children between the ages of 3 and 7 years. For a given dorsal root or rootlet, the electrical reflex threshold and response varied considerably when observed over several minutes. Changes in electrode pressure, mechanical dissection of the root, and reflex spatial facilitation were all found to contribute to the variability. Even when electrode pressure was held constant, intrinsic spinal cord reflex variability substantially weakened the predictability of the intraoperative selection method used during this surgery.
对8名3至7岁儿童进行了选择性背根切断术中反射反应变异性的研究。对于给定的背根或神经根丝，在数分钟内观察时，电反射阈值和反应变化很大。发现电极压力的变化、神经根的机械分离以及反射空间易化均导致了这种变异性。即使电极压力保持恒定，脊髓固有反射变异性也极大地削弱了该手术中所使用的术中选择方法的可预测性。
