Existence and features of the myodural bridge in Gallus domesticus: indication of its important physiological function
Existence and features of the myodural bridge in Gallus domesticus: indication of its important physiological function
复制标题
家鸡肌硬膜桥的存在和特征：表明其重要的生理功能。
DOI：
10.1007/s12565-018-00470-2
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发表时间：
2019-03-01
影响因子：
1.2
通讯作者：
Sui, Hong-Jin
中科院分区：
文献类型：
--
作者：
Dou, Ya-Ru;Zheng, Nan;Sui, Hong-Jin
肌硬膜桥（MDB）是一种致密的结缔组织，它通过寰枕后间隙和寰枢间隙将肌肉与颈段脊髓硬膜相连。到目前为止，肌硬膜桥的生理功能尚未完全阐明。最近的研究已经确定了哺乳动物中存在肌硬膜桥，但关于鸟类中肌硬膜桥存在的信息却非常少。我们选择家鸡来探索鸟类中肌硬膜桥的存在及其纤维特性。我们发现，在家鸡中，源于头后小直肌腹侧的纤维与寰枕背侧膜融合，并且许多小梁将寰枕背侧膜与颈段脊髓硬膜相连。此外，枕静脉窦位于小梁之间。肌硬膜桥主要由I型胶原纤维组成。我们的研究结果表明，家鸡中存在肌硬膜桥，这使我们推断肌硬膜桥是一种高度保守的进化结构，可能起着重要的生理作用。
The myodural bridge (MDB) is a dense connective tissue that connects muscles with the cervical spinal dura mater via the posterior atlanto-occipital and atlato-axial interspaces. To date, the physiological function of the MDB has not been fully elucidated. Recent studies have identified the presence of the MDB in mammals, but very little information is available on the existence of the MDB in avifauna. We selected Gallus domesticus to explore the existence and the fiber property of the MDB in avifauna. We found that in this species, fibers originating from the ventral aspect of the rectus capitis dorsal minor are fused with the dorsal atlanto-occipital membrane and that numerous trabeculae connect the dorsal atlanto-occipital membrane with the cervical spinal dura mater. Furthermore, the occipital venous sinus is located between the trabeculae. The MDB is mainly composed of collagen type I fibers. Our results show that the MDB is present in G. domesticus and lead us to infer that the MDB is a highly conservative evolutionary structure which may play essential physiological roles.