The Probert Encyclopaedia of Medicine

ISCHIUM

The ischium is one of the three sections of bone which are fused in the adult to form the pelvis. The ischium bears the weight when sitting, and is attached to the pubis in front and to the ala, or wings, of the ilium laterally and to the back. The large openings in the ischium on either side of the pelvis, just below the pubis, are called the obturator foramina.
Research Ischium