影像解剖 | 腹、盆壁肌层CT解剖

2023-11-17 影像诊断与科研 影像诊断与科研 发表于上海

腹壁肌肉能够覆盖腹腔,支持稳定而灵活的运动,同时也能保护腹腔脏器免受损害。从肌肉角度来讲,人的腹壁由5对肌肉和后背部的肌群、脊柱组成。

腹壁肌群结构

腹壁肌肉能够覆盖腹腔,支持稳定而灵活的运动,同时也能保护腹腔脏器免受损害。从肌肉角度来讲,人的腹壁由5对肌肉和后背部的肌群、脊柱组成。根据它们的位置,这些肌肉可分为两部分:前外侧肌群和后肌群。

腹壁的前外侧肌群:前外侧肌群有 5 块成对的肌肉,根据肌纤维的走向,腹壁前外侧肌群可以分为两组。它们是三块扁平的肌肉和两块垂直的肌肉。

三块扁平肌肉包括腹外斜肌、内斜肌和腹横肌,它们的功能是弯曲和旋转躯干,以及压紧腹内容物,从而增加腹内压,协助排尿和排便过程。腹壁肌肉收缩引起的腹内压增高也有助于分娩。咳嗽或打喷嚏时,使用腹壁肌肉用力呼吸,也有助于排出气道内的物质。

两块垂直的肌肉是腹直肌和小锥状肌。它们由腹直肌鞘包裹,与白线有关。腹直肌鞘和白线都由腹壁前外侧的扁平肌肉的腱膜形成。

后肌群即后背部肌群,下回分解。

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简略版

外侧群∶腹外斜肌、腹内斜肌和腹横肌。

内侧群∶腹直肌和锥状肌。

腹部深层肌∶腰方肌和腰大肌。

腹肌外侧群的腱膜包裹腹直肌,构成腹直肌鞘。

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    2023-11-17 医鸣惊人 来自山西省

    认真学习了

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    2023-11-17 yzw1986yzw 来自山东省

    不错

    0

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