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| lesser sciatic foramen ： ウィキペディア英語版 |
lesser sciatic foramen
The lesser sciatic foramen is an opening (foramen) between the pelvis and the back of the thigh. The foramen is formed by the sacrotuberous ligament which runs between the sacrum and the ischial tuberosity and the sacrospinous ligament which runs between the sacrum and the ischial spine.
==Structure==
The lesser sciatic foramen has the following boundaries:
* Anterior: the tuberosity of the ischium
* Superior: the spine of the ischium and sacrospinous ligament
* Posterior: the sacrotuberous ligament
Alternatively, the foramen can be defined by the boundaries of the lesser sciatic notch and the two ligaments.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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