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.
Structure
The
pudendal nerve
The pudendal nerve is the main nerve of the perineum. It carries sensation from the external genitalia of both sexes and the skin around the anus and perineum, as well as the motor supply to various pelvic muscles, including the male or fem ...
travels close to the ischial spine.
Clinical significance
The ischial spine can serve as a landmark in
pudendal anesthesia Pudendal anesthesia, also known as a pudendal block, or saddle block, is a form of local anesthesia commonly used in the practice of obstetrics to relieve pain during the delivery of baby by forceps. The pudendal nerve block prevents fainting durin ...
, as the
pudendal nerve
The pudendal nerve is the main nerve of the perineum. It carries sensation from the external genitalia of both sexes and the skin around the anus and perineum, as well as the motor supply to various pelvic muscles, including the male or fem ...
lies close to the ischial spine.
Additional images
File:Sciatic notches.png, Right hip bone, external surface, showing the greater and lesser sciatic notches, separated by the ischial spine.
File:Gray319.png, Articulations of pelvis. Anterior view.
File:Slide3ADA.JPG, PELVIS. ANTERIOR VIEW.
References
External links
* - "The Female Perineum: Osteology"
* - "The Male Pelvis"
{{Authority control
Bones of the pelvis
Ischium