![[臂丛]后束 - 肩MRI - Axial T1 FS - e-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/eanatomy/modules/shoulder-mr-arthrography/images/v2/4a18a4a8940760814dc8cca6ebd68343591ea5a48253198d143f8c03de5f69b7?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=MjQ4LDQwMw&t=W-iHguS4m13lkI7mnZ8&tf=Tm90byBTYW5zIFND&tx=248&ty=403&w=350&wk=1&s=2503fcd229d398daaf9661d62fa77b72)
[臂丛]后束
Fasciculus posterior
- 相关用语: 盂肱下韧带 - [臂丛]后束
定义
盂肱下韧带（IGHL）实际上被定义为一个复合结构，由关节囊的前束和后束以及腋隐窝组成，在盂侧由盂肱螺旋韧带予以加强。与其他盂肱韧带不同，其起点与盂唇基底部不可分离：
- 前束起自前盂唇下三分之二处（时钟2点至4点位置）。当存在冗余时，可与盂软骨前缘重叠。
- 当盂肱下韧带正常时，腋囊或腋隐窝在磁共振关节造影（MRA）或CT关节造影（CTA）上呈U形表现。
- 后束起自盂下缘时钟7点至9点位置。盂肱下韧带的前束和后束均止于肱骨外科颈下方。
盂肱下韧带（IGHL）是维持关节稳定性最重要的盂肱韧带，当上臂外展至约90°时，对盂肱关节起到稳定作用。
来源：正常肩关节MRI及MR关节造影：解剖与技术。Llopis E, Montesinos P, Guedez MT, Aguilella L, Cerezal L. Semin Musculoskelet Radiol. 2015 Jul;19(3):212-30. doi: 10.1055/s-0035-1549316. Epub 2015 May 28. Review. PMID: 26021583
參考資料
![[臂丛]后束 - 肩MRI - Axial T1 FS - e-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/eanatomy/modules/shoulder-mr-arthrography/images/v2/4a18a4a8940760814dc8cca6ebd68343591ea5a48253198d143f8c03de5f69b7?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=MjQ4LDQwMw&t=W-iHguS4m13lkI7mnZ8&tf=Tm90byBTYW5zIFND&tx=248&ty=403&w=200&wk=1&s=e33cfe83742733f8abe69703740f8cb0 "[臂丛]后束 - 肩MRI - Axial T1 FS - e-Anatomy")
![[臂丛]后束 - 肩MRI - Coronal T1 FS - e-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/eanatomy/modules/shoulder-mr-arthrography/images/v2/aa5644a6c38a450cbf99cb155134a06f02c90cb943d42128ae0ba7fa199d7348?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=MjgxLDM4MQ&t=W-iHguS4m13lkI7mnZ8&tf=Tm90byBTYW5zIFND&tx=281&ty=381&w=200&wk=1&s=82a0b4b2787bd0fd362bd92385dd035a "[臂丛]后束 - 肩MRI - Coronal T1 FS - e-Anatomy")
![[臂丛]后束 - 肩MRI - Coronal PD FS - e-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/eanatomy/modules/shoulder-mr-arthrography/images/v2/36aeda8ca8024da3846c5075506e284e6ea2344fe0c160f6ea82f4e3028bcf95?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=Mjc3LDM5NQ&t=W-iHguS4m13lkI7mnZ8&tf=Tm90byBTYW5zIFND&tx=277&ty=395&w=200&wk=1&s=2ac707113334239c11e5642fa6687fcb "[臂丛]后束 - 肩MRI - Coronal PD FS - e-Anatomy")
![[臂丛]后束 - 肩MRI - Sagittal T1 - e-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/eanatomy/modules/shoulder-mr-arthrography/images/v2/e8a28372ee93c5c82bcc0bc800ed75b0449da2b559ca2e5b6c558054316944d3?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=NDgzLDM0MA&t=W-iHguS4m13lkI7mnZ8&tf=Tm90byBTYW5zIFND&tx=483&ty=340&w=200&wk=1&s=ad0b8a8a904dfa4f37d81f1c7752425a "[臂丛]后束 - 肩MRI - Sagittal T1 - e-Anatomy")
