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.)
Details
Identifiers
Latin	Spina ischiadica Spina ischiaca Spina ischialis
TA98	A02.5.01.205
TA2	1343
FMA	17028
Anatomical terms of bone

From the posterior border of the body of the Ischium there extends backward a thin and pointed triangular eminence, the ischial spine, more or less elongated in different subjects.

Surfaces

external surface	gives attachment to the Gemellus superior
internal surface	gives attachment to the Coccygeus, Levator ani, and the pelvic fascia
pointed extremity	the sacrospinous ligament is attached.

Clinical significance

It can serve as a landmark in pudendal anesthesia.

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.

References

This article incorporates text in the public domain from page 235 of the 20th edition of Gray's Anatomy (1918)

External links

• Anatomy photo:41:os-0105 at the SUNY Downstate Medical Center - "The Female Perineum: Osteology"
• Anatomy photo:44:st-0724 at the SUNY Downstate Medical Center - "The Male Pelvis"