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
The iliac fossa is a large, smooth, concave surface on the internal surface of the Ilium (bone), ilium (part of the three fused bones making the hip bone).
Structure
The iliac fossa is bounded above by the iliac crest, and below by the Arcuate ...
and
Iliacus muscle.
It forms part of the border of the
pelvic inlet.
In combination with the
pectineal line, it comprises the
iliopectineal line.
The arcuate line marks the border between the body (''corpus'') and the
wing
A wing is a type of fin that produces both Lift (force), lift and drag while moving through air. Wings are defined by two shape characteristics, an airfoil section and a planform (aeronautics), planform. Wing efficiency is expressed as lift-to-d ...
(''ala'') of the ilium, and, running inferior, anterior, and medial from the auricular surface to the area corresponding to the
acetabulum
The acetabulum (; : acetabula), also called the cotyloid cavity, is a wikt:concave, concave surface of the pelvis. The femur head, head of the femur meets with the pelvis at the acetabulum, forming the Hip#Articulation, hip joint.
Structure
The ...
, it also indicates where weight is transferred from the
sacroiliac joint to the
hip joint
In vertebrate anatomy, the hip, or coxaLatin ''coxa'' was used by Celsus in the sense "hip", but by Pliny the Elder in the sense "hip bone" (Diab, p 77) (: ''coxae'') in medical terminology, refers to either an anatomical region or a joint o ...
.
Additional images
File:Arcuate line of ilium 02 animation.gif, Position of arcuate line of ilium. Shown in red.
File:Arcuate line of ilium 03 animation.gif, Close up
File:Skeletal pelvis-pubis.svg, Pelvis with the iliopectineal line indicated in red
References
External links
{{Authority control
Bones of the pelvis
Ilium (bone)