A specialized myodural bridge named occipital-dural muscle in the narrow-ridged finless porpoise (Neophocaena asiaeorientalis).
A specialized myodural bridge named occipital-dural muscle in the narrow-ridged finless porpoise (Neophocaena asiaeorientalis).
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窄脊江豚 (Neophocaena asiaeorientalis) 中存在一种特殊的肌硬膜桥，称为枕骨硬膜肌
DOI：
10.1038/s41598-021-95070-y
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发表时间：
2021-07-29
影响因子：
4.6
通讯作者：
Sui HJ
中科院分区：
文献类型：
--
作者：
Zhang ZX;Gong J;Yu SB;Li C;Sun JX;Ding SW;Ma GJ;Sun SZ;Zhou L;Hack GD;Zheng N;Sui HJ
一种名为肌硬膜桥（MDB）的致密桥状组织，连接枕下肌和脊髓硬膜，最初在人类中被发现。然而，近期的动物研究表明，MDB似乎是一种在进化上保守的解剖结构，可能具有重要的生理功能。我们之前的研究已证实江豚存在MDB。本文作者进行了研究以阐述江豚（Neophocana asiaeorientalis，N.asiaeorientalis）中MDB的特异性。本研究使用了5具经福尔马林固定的江豚尸体。其中2具用于头颈部CT扫描、三维重建以及枕下区的大体解剖。另一具用于P45塑化研究。还有一具用于枕下区的组织学分析，一具用于扫描电子显微镜研究。结果显示，江豚的MDB实际上是一块独立的肌肉，起自枕骨后缘，穿过寰枕后间隙，然后附着于颈椎脊髓硬膜。因此，江豚所谓的MDB实际上是一块独立且独特特化的肌肉。基于这块肌肉的起止点，作者将其命名为“枕 - 硬膜肌”。似乎这块肌肉对颈椎脊髓硬膜的直接牵拉可通过一种泵送作用改变蛛网膜下腔的容积，从而影响脑脊液的循环。
A dense bridge-like tissue named the myodural bridge (MDB) connecting the suboccipital muscles to the spinal dura mater was originally discovered in humans. However, recent animal studies have revealed that the MDB appears to be an evolutionarily conserved anatomic structure which may have significant physiological functions. Our previous investigations have confirmed the existence of the MDB in finless porpoises. The present authors conducted research to expound on the specificity of the MDB in the porpoiseNeophocana asiaeorientalis (N.asiaeorientalis).Five carcasses ofN.asiaeorientalis,with formalin fixation, were used for the present study. Two of the carcasses were used for head and neck CT scanning, three-dimensional reconstructions, and gross dissection of the suboccipital region. Another carcass was used for a P45 plastination study. Also, a carcass was used for a histological analysis of the suboccipital region and also one was used for a Scanning Electron Microscopy study. The results revealed that the MDB of theN.asiaeorientalisis actually an independent muscle originating from the caudal border of the occiput, passing through the posterior atlanto-occipital interspace, and then attaches to the cervical spinal dura mater. Thus the so called MDB of theN.asiaeorientalisis actually an independent and uniquely specialized muscle. Based on the origin and insertion of this muscle, the present authors name it the ‘Occipital-Dural Muscle’. It appears that the direct pull of this muscle on the cervical spinal dura mater may affect the circulation of the cerebrospinal fluid by altering the volume of the subarachnoid space via a pumping action.
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影响因子：
2.2
作者：
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作者：
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