The sacrospinous ligament attaches to which landmark?

• A. Ischial spine
• B. Ischial tuberosity
• C. Pubic Symphysis
• D. Iliac Crest

Answer: (A)

The main idea is to know where the sacrospinous ligament attaches: it runs from the sacrum and coccyx to a small projection on the ischium called the ischial spine. This attachment to the ischial spine helps form the boundaries of the lesser sciatic foramen. The ischial spine is a distinct, sharp projection located just above the ischial tuberosity. In contrast, the pubic symphysis is an anterior pelvic joint, the iliac crest is the upper border of the ilium, and the ischial tuberosity is the rough sit-bone below the spine.