Ischial spine
Ischial Spine
The Ischial Spine (pronounced: /ˈɪskiəl/ /spaɪn/) is a significant anatomical structure in the human pelvic region.
Etymology
The term "Ischial" is derived from the Greek word "Ischion," which means "hip." The term "Spine" is from the Latin word "Spina," which means "thorn" or "backbone."
Definition
The Ischial Spine is a pointed, bony projection located in the posterior part of the ischium, one of the three bones that make up the hip bone or os coxae. It serves as an attachment point for several muscles and ligaments, including the sacrotuberous ligament and the coccygeus muscle.
Related Terms
- Ischium: The lower and back part of the hip bone.
- Pelvis: The lower part of the torso, between the abdomen and the thighs.
- Sacrotuberous ligament: A ligament that connects the sacrum to the ischium.
- Coccygeus muscle: A small muscle located in the pelvic region, attached to the ischial spine.
Clinical Significance
The Ischial Spine is a landmark in obstetrics used to determine the progress of labor. It is also a reference point in the pudendal nerve block, a procedure to alleviate pain during childbirth.
External links
- Medical encyclopedia article on Ischial spine
- Wikipedia's article - Ischial spine
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