Arcuate line (ilium)

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Arcuate line (ilium)
Male pelvis. (Arcuate line labeled at left.)
Right hip bone. Internal surface. (Arcuate line visible at left center.)
Latin linea arcuata ossis ilii
Gray's subject #57 233
Dorlands/Elsevier l_10/12496049
For other arcuate lines, see arcuate line.

The arcuate line of the ilium is a smooth rounded border on the internal surface of the ilium. It is immediately inferior to the iliac fossa and Iliacus muscle.

It runs inferior, anterior, and medial.

It forms part of the border of the pelvic inlet.

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Pelvis/pelvic cavity: sacrum, coccyx, hip bone
Ilium: Arcuate line - Wing - gluteal lines (Posterior, Anterior, Inferior) - Fossa - Tuberosity - Crest - iliac spines (Anterior superior - Anterior inferior - Posterior superior - Posterior inferior)

Ischium: Body (Ischial spine, Lesser sciatic notch) - Superior ramus (Tuberosity of the ischium) - Inferior ramus

Pubis: Superior ramus (Pubic tubercle, Pubic crest, Obturator crest) - Inferior ramus (Pectineal line)

Compound: Obturator foramen - Acetabulum - Acetabular notch - Greater sciatic notch - Iliopectineal eminence - Ischiopubic ramus - Pubic arch - Lesser pelvis (Pelvic inlet, Pelvic brim, Pelvic outlet) - Greater pelvis