At which lumbar vertebra number is the iliac crest located?

The iliac crest is generally located at the level of the fourth lumbar vertebra (L4). This anatomical landmark is significant in various medical procedures, including lumbar punctures and spinal anesthesia, where identifying the right vertebral level is crucial for successful interventions. The iliac crest serves as a palpable landmark that helps clinicians identify the corresponding vertebral level and ensures accurate positioning during procedures involving the lower back.

In clinical practice, understanding the relationship between the iliac crest and lumbar vertebrae aids in achieving proper patient positioning and can help avoid complications during interventions. Positions for imaging or surgical procedures often reference the iliac crest, further emphasizing its importance in anatomy and procedural accuracy.