Gürer Bora, Canbay Suat, Bozkurt Melih, Cikla Ulaş, Hananya Tomer, Okut Hayrettin, Başkaya Mustafa K
Department of Neurological Surgery, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin.
Clin Anat. 2014 Jul;27(5):733-7. doi: 10.1002/ca.22292. Epub 2013 Jul 26.
The denticulate ligaments (DL), 20 or 21 pairs of meningeal extensions, spread from the lateral aspect of the spinal cord to the internal aspect of the spinal dura mater. The aim of this study is to define the specific relationship of the DL with adjacent axilla of the spinal nerve roots and to investigate the anatomical features of the DLs and their variations. The topographical anatomy of the DLs and their relationships with the adjacent axilla of the spinal nerve roots was examined on 16 formalin-fixed adult cadaveric spinal cords. The distances from the dural attachment of the DL to the axilla of the superior and inferior spinal nerve roots were measured bilaterally at every spinal level. Also the distances from the dural attachment of the DL to the lateral aspect of the spinal cord were measured bilaterally. Cervical DLs showed a triangular shape, while in the thoracic segment the ligament changes the shape to "Y." Also the most caudal DL was identified to be at the L1-2 level. Our study revealed that the distances from the dural attachment of the DL to the superior and inferior spinal nerve root axilla were different at the cervical, upper thoracic and the lower thoracic segments. Both distances to the superior and inferior spinal nerve root axilla were shown to increase from cervical to lower thoracic segments. This study provides a detailed anatomy of the DLs and their relationship with the adjacent spinal nerve root axilla.
齿状韧带（DL）有20或21对，是脑膜的延伸部分，从脊髓侧面延伸至脊髓硬脑膜内面。本研究的目的是明确齿状韧带与相邻脊神经根腋部的具体关系，并研究齿状韧带的解剖特征及其变异情况。在16具用福尔马林固定的成人尸体脊髓上，检查了齿状韧带的局部解剖结构及其与相邻脊神经根腋部的关系。在每个脊髓节段双侧测量从齿状韧带硬膜附着点到上、下脊神经根腋部的距离。同时也双侧测量从齿状韧带硬膜附着点到脊髓侧面的距离。颈段齿状韧带呈三角形，而在胸段韧带形状变为“Y”形。此外，最尾侧的齿状韧带位于L1 - 2水平。我们的研究表明，在颈段、上胸段和下胸段，从齿状韧带硬膜附着点到上、下脊神经根腋部的距离不同。从上、下脊神经根腋部的距离均显示从颈段到下胸段逐渐增加。本研究提供了齿状韧带的详细解剖结构及其与相邻脊神经根腋部的关系。
