Contents
- Name of bone
- Location/Articulation
- Muscle and ligament attachments
- Surface anatomy
- Radiography
- Physical examination
- Embryology
- Anomalies
- Injuries/Disorders
Name of bone
Ischium
Location/Articulation
The ischium forms the lower and back part of the hip bone (os coxae). Situated below the ilium and behind the pubis, the ischium is one of three bones whose fusion creates the coxa.
The word “ischium” comes from the Greek ischion, meaning “hip.” (Taber’s, 1985).
Muscle and ligament attachments
Surface anatomy
The strongest of the coxal bones, the ischium is comprised of three parts:
- Body of ischium – the portion that supports weight while sitting (especially noticeable on a hard surface)
- Superior ramus of the ischium
- Inferior ramus of the ischium
Figure 1. Anatomy of the pelvic bones
Radiography
Physical examination
Embryology
Anomalies
Injuries/Disorders
Clinically, avulsion fracture of the ischial apophysis may occur.
