Which structure attaches to the ischial spine?

Which structure attaches to the ischial spine?

• A. Sacrospinous ligament
• B. Sacrotuberous ligament
• C. Inguinal ligament
• D. Iliolumbar ligament

Answer: (A)

The ischial spine serves as the attachment point for the sacrospinous ligament. This slender projection on the posterior ischium is the anchor from the sacrum and coccyx to the spine, helping create the boundaries between the greater and lesser sciatic foramina. The sacrotuberous ligament, by contrast, attaches to the ischial tuberosity, not the spine. The inguinal ligament runs from the anterior superior iliac spine to the pubic tubercle, far from the ischial spine. The iliolumbar ligament connects the ilium to the lumbar vertebrae. So, the sacrospinous ligament is the structure that attaches to the ischial spine.

The ischial spine serves as the attachment point for the sacrospinous ligament. This slender projection on the posterior ischium is the anchor from the sacrum and coccyx to the spine, helping create the boundaries between the greater and lesser sciatic foramina. The sacrotuberous ligament, by contrast, attaches to the ischial tuberosity, not the spine. The inguinal ligament runs from the anterior superior iliac spine to the pubic tubercle, far from the ischial spine. The iliolumbar ligament connects the ilium to the lumbar vertebrae. So, the sacrospinous ligament is the structure that attaches to the ischial spine.