The sacral tuberosity is associated with which joint?

The sacral tuberosity is associated with which joint?

• A. Sacroiliac joint (posterior)
• B. Pubic symphysis
• C. Acetabular joint
• D. Glenoid joint

Answer: (A)

The sacral tuberosity is a roughened area on the back of the sacrum where the interosseous sacroiliac ligaments attach to the sacrum and ilium. These ligaments are strong stabilizers of the sacroiliac joint, especially on the posterior side, so the sacral tuberosity is most closely associated with the sacroiliac joint. The other options refer to joints not connected to the sacrum’s tuberosity: the pubic symphysis is at the front midline between pubic bones, the acetabular joint is the hip between the acetabulum and femur, and the glenoid joint (glenohumeral) is the shoulder.

The sacral tuberosity is a roughened area on the back of the sacrum where the interosseous sacroiliac ligaments attach to the sacrum and ilium. These ligaments are strong stabilizers of the sacroiliac joint, especially on the posterior side, so the sacral tuberosity is most closely associated with the sacroiliac joint. The other options refer to joints not connected to the sacrum’s tuberosity: the pubic symphysis is at the front midline between pubic bones, the acetabular joint is the hip between the acetabulum and femur, and the glenoid joint (glenohumeral) is the shoulder.