Reina M A, López-García A, Dittmann M, de Andrés J A
Servicio de Anestesiología y Reanimación, Hospital General de Móstoles, Madrid.
Rev Esp Anestesiol Reanim. 1996 Apr;43(4):135-7.
The only references to the thickness of the human dura mater, reporting its size at various levels, are now 50 years old. Our aim was to study its tridimensional structure with the aid of the scanning electron microscope.
The samples, which were taken 8-12 h after death from 4 human cadavers between 70 and 78 years old, were examined on 2 orthogonal planes (radial longitudinal and transversal).
The architectural structure of the external membrane of the meninges was unusual. The dura mater is made up of elastic collagen fibers organized in successive parallel planes on the surface of the medulla. Each plane constitutes a unit which we will call a sub-laminae. The sub-laminae are found in groups of 8 to 12 that form larger units called laminae, which are between 4 and 5 microns thick. The full thickness of the dura mater at the level of the third lumbar vertebrate contains from 78 to 82 laminae which together measure 270 microns.
The dura mater is made up of a large number of sublaminae that are concentrically parallel to the surface of the medulla. The fibers in general run in all directions and are oriented differently in each sub-lamina. The orientation of fibers that can be seen on the outer or epidural surface corresponds only to the fibers of the outermost lamina, which has a thickness of 78 to 82 microns. A needle that pierces the dura mater passes through some 700 to 800 sublaminae, each with its own particular distribution of fibers.
目前关于人类硬脑膜厚度并报告其在不同层面尺寸的唯一参考文献已有50年历史。我们的目的是借助扫描电子显微镜研究其三维结构。
从4名年龄在70至78岁之间的人类尸体死亡后8 - 12小时采集样本，在两个正交平面（径向纵向和横向）上进行检查。
脑膜外层膜的结构架构不同寻常。硬脑膜由弹性胶原纤维组成，这些纤维在髓质表面以连续的平行平面排列。每个平面构成一个单元，我们称之为亚板层。亚板层以8至12个为一组，形成称为板层的更大单元，其厚度在4至5微米之间。第三腰椎水平处硬脑膜的总厚度包含78至82个板层，总厚度为270微米。
硬脑膜由大量与髓质表面同心平行的亚板层组成。一般来说，纤维向各个方向延伸，并且在每个亚板层中的取向不同。在外表面或硬膜外表面可见的纤维取向仅对应于最外层板层的纤维，其厚度为78至82微米。刺入硬脑膜的针会穿过大约700至800个亚板层，每个亚板层都有其独特的纤维分布。
