Spina ischiadica

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.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. 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. It can serve as a landmark in pudendal anesthesia. This article incorporates text in the public domain from page 235 of the 20th edition of Gray's Anatomy (1918)