![荐尾[尾骨]背内侧肌 - 狗 - 大体解剖 - 背侧 - vet-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/vetanatomy/modules/dog-general-anatomy-illustrations/images/v2/8447eea675351c2f23fb10ec71ab0d68ca4531dc8dbe5643791d9a0f67edf628?ar=640:670&auto=format,compress&bg=FFFFFF&fit=crop&p64=NjUyLDEyMDY&t=6I2Q5bC-W-WwvumqqF3og4zlhoXkvqfogow&tf=Tm90byBTYW5zIFND&tx=652&ty=1206&w=350&wk=1&s=772935e4b1de29bdbf763ee8fb99b7d8)
荐尾[尾骨]背内侧肌
Musculus sacrocaudalis [-coccygeus] dorsalis medialis
定义
起点： 尾椎尾侧缘背外侧的小突起。为多裂肌的直接延续。
止点，着生点，附着： 第五尾椎至最后一块尾椎的乳突。
功能： 尾部伸展，可能还参与侧屈。
神经： 尾背侧神经丛的分支。
变异：
在马属动物中，荐尾[尾骨]背内侧肌由粗壮的斜行肌束依次排列组成。起自最后三块荐椎及第一尾椎的棘突。前三个肌束以短腱止于尾椎的乳突。从第四个肌束起，肌腱逐渐变细，并在充当乳突的粗糙区与荐尾[尾骨]背外侧肌的肌腱汇合。
參考資料
Barone R. Anatomie comparée des mammifères domestiques, Tome 2, Arthrologie et myologie, 4th edition, Vigot, Paris, 2017.
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