Ischial spine | |
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![]() 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 |
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.
Part | Attachment |
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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]
The ischial spine can serve as a landmark in pudendal anesthesia, as the pudendal nerve lies close to the ischial spine.[3][4]