The ischial spine is part of the posterior border of the body of the
bone of the
pelvis
The pelvis (: pelves or pelvises) is the lower part of an Anatomy, anatomical Trunk (anatomy), trunk, between the human abdomen, abdomen and the thighs (sometimes also called pelvic region), together with its embedded skeleton (sometimes also c ...
. 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 is a Mixed nerve, mixed (motor and sensory) nerve and also conveys Sympathetic nervous system, sympathetic Autonomic nervous system, autonomic fibers. It carries sensation from the exter ...
travels close to the ischial spine.
Clinical significance
The ischial spine can serve as a landmark in
pudendal anesthesia, as the
pudendal nerve
The pudendal nerve is the main nerve of the perineum. It is a Mixed nerve, mixed (motor and sensory) nerve and also conveys Sympathetic nervous system, sympathetic Autonomic nervous system, autonomic fibers. It carries sensation from the exter ...
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.
File:Ischial spine - animation02-1.gif, Animation showing the ischial spine (highlighted in red)
References
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Bones of the pelvis
Ischium