RT Book, Section A1 Starkey, Chad A1 Brown, Sara D. SR Print(0) ID 1188372847 T1 Pelvis and Thigh Pathologies T2 Examination of Orthopedic & Athletic Injuries, 4e YR 2015 FD 2015 PB F. A. Davis Company PP New York, NY SN 9780803639188 LK fadavisat.mhmedical.com/content.aspx?aid=1188372847 RD 2024/10/09 AB The pelvic girdle forms the structural base of support between the lower extremities and the trunk. A relatively immobile structure, the pelvis is formed by pairs of three fused bones joined anteriorly by the pubic symphysis. The posterior portion of the pelvis is formed by the sacrum's wedging itself between the two halves of the pelvis. The hip articulation, formed by the femoral head and the acetabulum, is the strongest and most stable of the body's joints. However, this benefit is gained at the expense of range of motion (ROM).