Osmotherly Peter Grant, Rivett Darren A
School of Health Sciences, The University of Newcastle, Callaghan, NSW, Australia.
J Craniovertebr Junction Spine. 2020 Jul-Sep;11(3):180-185. doi: 10.4103/jcvjs.JCVJS_91_20. Epub 2020 Aug 14.
Published descriptions of the tectorial membrane have been inconsistent. Descriptions vary from a simple ligamentous band extending between the axis and occiput to a more complex layered structure composed of bands of fibers. The purpose of this study was to examine and document the macrostructure of the tectorial membrane.
The tectorial membrane was examined by fine dissection in 11 formalin-fixed human adult cadavers. Detailed descriptions of the macrostructure and attachments were recorded.
Each tectorial membrane examined consisted of two distinct layers. The superficial layer was composed variably of three or four bands. Its fibers extend caudally over multiple spinal levels, becoming continuous with the posterior longitudinal ligament. The deeper layer routinely consisted of three bands, each being firmly adherent to the posterior aspect of the body of the second cervical vertebra. Attachments of fibers from both layers extended beyond the foramen magnum to create a semicircular attachment onto the base of the skull.
The tectorial membrane has a more complex structure than has been described to date in standard anatomical texts. The existence of a layered and banded composition may have implications for understanding its function and for the clinical assessment of this structure.
已发表的关于覆膜的描述并不一致。描述范围从在枢椎和枕骨之间延伸的简单韧带束到由纤维束组成的更复杂的分层结构。本研究的目的是检查并记录覆膜的宏观结构。
在11具经福尔马林固定的成年人体尸体上通过精细解剖对覆膜进行检查。记录宏观结构和附着情况的详细描述。
每例检查的覆膜均由两个不同的层组成。表层由三或四条束带组成，其纤维在多个脊髓节段向尾侧延伸，并与后纵韧带相连。深层通常由三条束带组成，每条束带都牢固地附着于第二颈椎椎体的后面。两层的纤维附着延伸至枕骨大孔之外，在颅底形成半圆形附着。
覆膜的结构比目前标准解剖学教科书中所描述的更为复杂。分层和束状结构的存在可能对理解其功能以及对该结构的临床评估具有意义。
