Attachments on the Ilium

1.anterior superior iliac spine
ASIS

2.The outer lip of the iliac crest

insertion

  • inguinal ligament.-lateral end

origin

  • sartorius muscle
    extends onto the upper half of the notch below
    the spine.

insertion

origin

  • fascia lata- in its whole extent
  • external oblique muscle- anterior two-thirds.
  • iliotibial tract- The tubercle of the crest
  • tensor fasciae latae- in front of the
    tubercle.
    - latissimus dorsi- just behind the
    highest point of the crest.

3.inner lip of the iliac crest

origin

insertion

  • transversus abdominis - anterior two-thirds.
  • quadratus lumborum in its posterior
    one-third.
  • fascia transversalis &
    fascia iliaca in its anterior two-thirds,- deep to the
    attachment of the transversus abdominis.
  • thoracolumbar fascia around
    the attachment of the quadratus lumborum.

4.The intermediate area of the iliac crest

origin

  • internal oblique muscle- in its
    anterior two-thirds.

5.dorsal segment of the
iliac crest

origin

  • gluteus maximus.- lateral slope
  • erector spinae.

insertion

  • interosseous and dorsal sacroiliac ligaments- to the medial margin deep to the
    attachment of the erector spinae.

6.anterior inferior iliac spine

upper half

origin

  • straight head of the rectus femoris.

lower half

insertion

  • iliofemoral ligament.

7.posterior border of the ilium

origin

insertion

  • few fibers of the piriformis - from upper
    margin of the greater sciatic notch.
  • upper fibers of the sacrotuberous ligament -
    above the greater sciatic notch.

8.gluteal surface

origin

insertion

  • gluteus maximus- area behind the posterior gluteal line
  • gluteus medius -area between
    the anterior and posterior gluteal lines.
  • gluteus minimus - area between the
    anterior and inferior gluteal lines.
  • Below the inferior gluteal line, the reflected head
    of the rectus femoris - from the groove
    above the acetabulum.
  • capsular ligament of the hip joint - along the margin of acetabulum.

9.iliac fossa

origin

  • iliacus from its upper two-thirds.
  • The lower grooved part of the
    fossa is covered by the iliac bursa.

10.iliac tuberosity

insertion

  • interosseous sacroiliac ligament - in its greater part.
  • dorsal sacroiliac ligament -posteriorly.
  • The iliolumbar ligament- superiorly.

11.convex margin of the auricular surface

insertion

ventral sacroiliac ligament.

12.pelvic surface

origin

insertion

  • ventral sacroiliac ligament - lower fibers
  • a few fibers of the piriformis- pelvic surface lateral to the preauricular sulcus
    • The rest of the pelvic surface - obturator internus.- upper half