Ilium - Pelvic Girdle

Ilium

The ilium (see Figure 3.28) is the largest of the three bones and provides an extensive surface for attachment of muscles and tendons. It is in the form of a ridge superiorly, the iliac crest. Anteriorly, the iliac crest forms a prominence called the anterior supe-rior iliac spine. Posteriorly, the crest ends at the pos-terior superior iliac spine. Posteriorly and inferi-orly, there is a deep notch called thegreater sciaticnotch. Other important landmarks on the ilium areshown in Figure 3.27.