Ischial spine
Part of the posterior border of the body of the ischium bone of the pelvis From Wikipedia, the free encyclopedia
The ischial spine is part of the posterior border of the body of the ischium bone of the pelvis. It is a thin and pointed triangular eminence, more or less elongated in different subjects.
| Ischial spine | |
|---|---|
Capsule of hip-joint (distended). Posterior aspect. (Spine of ischium labeled at upper left.) | |
 Left hip-joint, opened by removing the floor of the acetabulum from within the pelvis. (Spine of ischium labeled at center left.) | |
| Details | |
| Identifiers | |
| Latin | spina ischiadica spina ischiaca spina ischialis |
| TA98 | A02.5.01.205 |
| TA2 | 1343 |
| FMA | 17028 |
| Anatomical terms of bone | |
Structure
| Part | Attachment |
|---|---|
| external surface | gemellus superior muscle[1] |
| internal surface | coccygeus muscle,[2] levator ani muscle, pelvic fascia |
| pointed extremity | sacrospinous ligament |
The pudendal nerve travels close to the ischial spine.[3]
Clinical significance
The ischial spine can serve as a landmark in pudendal anesthesia, as the pudendal nerve lies close to the ischial spine.[3][4]
Additional images
- Right hip bone, external surface, showing the greater and lesser sciatic notches, separated by the ischial spine
- Articulations of pelvis. Anterior view.
- Pelvis. Anterior view.
- Animation showing the ischial spine (highlighted in red)
References
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