Lafuente D J, Andrew J, Joy A
J Neurol Neurosurg Psychiatry. 1985 Jun;48(6):579-81. doi: 10.1136/jnnp.48.6.579.
Sparing of sensation in sacral dermatomes and of sphincter control was found in eight out of fourteen cases of severe cauda equina compression from massive central lumbar disc prolapse. Although the triangular shape of the lumbar spinal canal may be one factor for this it was found from a necropsy model that the increase in linear strain on the stretched roots of the cauda equina is least in the more centrally placed lower sacral roots. It is argued that the lower tension in these roots is determined by Young's Modulus.
在14例因巨大中央腰椎间盘突出导致严重马尾神经受压的病例中，有8例发现骶部皮节感觉及括约肌控制功能得以保留。尽管腰椎椎管的三角形形态可能是一个因素，但从尸检模型中发现，马尾神经受牵拉根部的线性应变增加在骶部较低且位置更靠中央的神经根中最小。有人认为这些神经根中较低的张力是由杨氏模量决定的。
