Which term describes the area where the spine meets the pelvis?

• A. Paraspinal tenderness
• B. Sacroilliac joint
• C. Avulsion
• D. Ecchymosis

Answer: (B)

The term that describes the area where the spine meets the pelvis is the sacroiliac joint. This joint is located at the junction of the sacrum, which is the triangular bone at the base of the spine, and the iliac bones of the pelvis. The sacroiliac joint plays a crucial role in transferring weight and forces between the upper body and the lower body. It provides stability to the pelvis while allowing for limited movement, which is important during activities such as walking or lifting.

The other terms do not refer to this specific anatomical location. Paraspinal tenderness relates to pain in the muscles adjacent to the spine, avulsion refers to a type of injury where a body structure is forcibly detached, and ecchymosis refers to the discoloration of the skin resulting from bleeding underneath, often due to bruising. Thus, the correct term for the junction of the spine and pelvis is the sacroiliac joint.