Posterior inferior iliac spine
Spina iliaca posterior inferior
Definition
The posterior inferior iliac spine is a notable bony protuberance located on the posterior border of the iliac portion of the hip bone, below the posterior superior iliac spine. The area beneath the posterior inferior iliac spine is characterized by the presence of the greater sciatic notch.
Certain fibers of the piriformis muscle originate from the posterior inferior iliac spine and the upper edge of the greater sciatic notch.
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Text written by Muhammad A. Javaid, MD, PhD © 2023 IMAIOS.
Standring, S. and Gray, H. (2016). ‘Chapter 80: Pelvic girdle, gluteal region and thigh’ in Gray’s anatomy The anatomical Basis of Clinical Practice. (41st ed.) New York: Elsevier, pp. 1341-1343.
