Radiologic clinics of North America
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Radiol. Clin. North Am. · Nov 2000
ReviewAnatomy of the extradural compartments of the lumbar spinal canal. Peridural membrane and circumneural sheath.
The development of newer and more accurate methods of identifying the structures within the spinal canal has given a much better understanding of the soft tissue structures that lie between the dura and the surrounding bone of the vertebral canal. One anatomic structure of special importance, but seldom spoken of, is the peridural membrane. Although it was mentioned in the writings of Fick14 as early as 1904, it was Dommissee12,13 who first described it accurately and who named it the peridural membrane. ⋯ At this same point the dural sleeve becomes adherent to the nerve and henceforth is called the epineurium. For this 1- to 2- cm segment of spinal nerve from the dura to just beyond the ganglion we propose the name dural root sleeve. After all, it is a sleeve, it is made of dura, and it covers two nerve roots.