Important Bony Landmarks of the Lower Limb

The human pelvis serves as a foundation for lower limb movement and stability. Several critical bony landmarks provide attachment points for muscles, support structural integrity, and aid in medical assessments.

Pelvic Bone Landmarks

Iliac Crest

The iliac crest is the superior border of the ilium, easily palpable and commonly used for bone graft harvesting.

Anterior Superior Iliac Spine (ASIS)

A prominent point on the anterior ilium, the ASIS serves as an attachment site for the sartorius muscle and is crucial in clinical assessments.

Ischial Tuberosity

Located on the inferior part of the pelvis, the ischial tuberosity acts as a weight-bearing structure while sitting and anchors the hamstring muscles.

Pubic Symphysis

A cartilaginous joint uniting both pubic bones, the pubic symphysis plays a vital role in stability, particularly during pregnancy and childbirth.

Clinical Significance

• Orthopedic Assessments: These landmarks help in diagnosing fractures, misalignment, and degenerative conditions.
• Muscular Attachments: Various muscles rely on these sites for anchorage, affecting mobility and biomechanics.
• Palpation Guides: Physicians use these landmarks for palpation in procedures like intramuscular injections.