Ischial spine

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.)
LatinSpina ischiadica
Spina ischiaca
Spina ischialis
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
external surface gemellus superior muscle
internal surface coccygeus muscle, levator ani muscle, pelvic fascia
pointed extremity sacrospinous ligament

The pudendal nerve travels close to the ischial spine.

Clinical significance

The ischial spine can serve as a landmark in pudendal anesthesia, as the pudendal nerve lies close to the ischial spine.

Additional images

This page was last updated at 2021-11-17 15:44 UTC. Update now. View original page.

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