Biomedical Basics

Pelvis and hip joint anatomy

  • Created by Henry Stewart Talks
Published on January 28, 2026   4 min

A selection of talks on Physiology & Anatomy

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This talk, the focus is pelvis and hip joint anatomy, supported by coverage of the anatomy of the pelvis, including its major bones, joints, and their significance in weight transmission, organ protection, and movement. We will discuss the structure of the hip joint, its stability provided by both bony architecture and ligaments, and the muscles responsible for various movements. Key functions of the hip, such as flexion, extension, abduction, adduction, and rotation will be explained. We will also highlight how proper hip stabilization is crucial for gait and posture and how dysfunction can impact mobility. The pelvis forms a critical foundation for the trunk and lower limbs, composed of three main bones on each side, ilium, ischium and pubis, which fuse during adolescence. The two pelvic bones meet at the pubic symphysis and attach to the sacrum with the coccyx below. This pelvic girdle transmits upper body weight, protects organs, and provides points for muscles and ligaments. The pelvis' shape is vital for childbirth and movement with the iliac crest as the upper border and ischial tuberosities as sitting bones. The hip joint is a classic synovial ball and socket joint, permitting movement in multiple planes. The socket or acetabulum is a deep cavity formed by the ilium, ischium and pubis. The spherical head of the femur fits into the acetabulum and is covered in articular cartilage for smooth low friction movement. The acetabular labrum enhances stability,

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