Scali Frank, Ohno Ai, Enix Dennis, Hassan Sherif
Medical Education and Anatomy, California University of Science and Medicine, Colton, USA.
Medicine, California University of Science and Medicine, Colton, USA.
Cureus. 2022 May 30;14(5):e25484. doi: 10.7759/cureus.25484. eCollection 2022 May.
Sheet plastination has provided evidence that the posterior atlantooccipital membrane attaches to the dura's posterior sleeve at the cerebrospinal junction. These findings contradict the traditional anatomical description of this membrane extending from the atlas' posterior arch to the foramen magnum.
A total of 16 plastinated cadavers were studied to evaluate the and gross configuration of the posterior atlantooccipital membrane. Fifteen cadavers underwent sheet plastination, and one head was hemisected and plastinated. In all specimens, stereomicroscopy was used to evaluate the posterior atlantooccipital membrane and related structures within the intervertebral and epidural spaces.
In all 16 specimens, the posterior atlantooccipital membrane extending from the occiput, merged with the craniocervical dura mater, and formed a membrane-dura complex that ended at the level of the third cervical vertebra. The superior and inferior myodural bridge coalesced with their respective vertebrodural ligaments and fused with the posterior atlantooccipital membrane at their respective interspaces.
The median aspect of the posterior atlantooccipital membrane does not directly communicate with the posterior arch of the atlas. Instead, the posterior atlantooccipital membrane converges with the craniocervical dura mater and terminates at the level of the third cervical vertebra. This membrane-dura complex serves as a common attachment site for the myodural and vertebrodural structures.
薄片塑化技术已证实寰枕后膜在脑脊液连接处附着于硬脑膜的后袖。这些发现与该膜从寰椎后弓延伸至枕骨大孔的传统解剖学描述相矛盾。
共研究了16具塑化尸体，以评估寰枕后膜的大体形态。15具尸体进行了薄片塑化，1例头部进行了半切并塑化。在所有标本中，使用体视显微镜评估寰枕后膜及椎间和硬膜外间隙内的相关结构。
在所有16个标本中，寰枕后膜从枕骨延伸，与颅颈硬脑膜融合，形成一个膜 - 硬脑膜复合体，止于第三颈椎水平。上、下肌硬膜桥与其各自的椎硬膜韧带合并，并在各自的间隙处与寰枕后膜融合。
寰枕后膜的正中部分不直接与寰椎后弓相连。相反，寰枕后膜与颅颈硬脑膜汇合，并在第三颈椎水平终止。这种膜 - 硬脑膜复合体是肌硬膜和椎硬膜结构的共同附着部位。
