Os Coxae Flashcards
ilium
thin, blade-like portion superior to the hip socket
ishium
massive, blunt, posteroinferior part of the bone that one sits on
pubis
anterioinferior part of the bone that approaches the opposite os coxae in the middle
acetabulum
laterally facing, hemispherical hollow that forms the socket of the hip which articulates with the head of the femur
acetabular fossa (or notch)
the nonarticular surface within the acetabulum
lunate surface
crescent-shaped articular surface within the acetabulum where the femoral head actually articulates
iliac pillar (acetabula-cristal buttress)
the bony thickening or buttress, located vertically above the acetabulum on the lateral iliac surface
this pillar extends to the superior margin of the ilium
iliac (cristal) tubercle
the thickening at the superior terminus of the iliac pillar
iliac crest
superior boarder of the ilium
S-shaped when viewed superiorly
gluteal lines
rough, irregular lines that demarcate the attachment of the gluteal muscles on the lateral surface of the ilium
anterior superior iliac spine
located at the anterior end of the iliac crest
anterior inferior iliac spine
blunt projection on the anterior boarder of the os coxae just superior to the acetabulum
posterior superior iliac spine
the posterior terminus of the iliac crest
posterior inferior iliac spine
is a sharp projection just posteroinferior to the auricular surface
greater sciatic notch
is the wide notch just inferior to the posterior inferior iliac spine
ischial spine
located just inferior to the greater sciatic notch
lesser sciatic notch
the notch between the ischial spine superiorly and the rest of the ischium inferiorly
ischial tuberosity
the blunt, rough, massive posteroinferior corner of the os coxae
auricular surface
ear-shaped sacral articulation on the medial surface of the ilium
iliac tuberosity
roughened surface just posterosuperior to the auricular surface
preauricular sulcus
variable groove along the anteroinferior edge of the auricular surface
iliac fossa
the smooth hollow on the medial surface of the iliac blade
arcuate line
an elevation that sweeps anteroinferiorly across the medial surface of the os coxae from the apex of the auricular surface towards the pubis
iliopubic (iliopectineal) eminence
marks the point of union of the ilium and the pubis just lateral to the arcuate line
iliopubic (superior pubic) ramus
connects the pubic to the ilium at the acetabulum
ishiopubic (inferior pubic) ramus
is the thin, flat strip of bone connecting the pubis to the ischium
pubic symphysis
is the near-midline surface of the pubis where the two ossa coxa most closely approach
obturator foramen
is the large foramen encircled by the two pubic rami and the ischium
obturator groove (sulcus)
is the wide groove on the medial surface of the iliopubic ramus, at the superiolateral corner of the obturator foramen
Siding: isolated pubic regions
the vental surface is rough, the dorsal is smooth and convex, the symphysis faces the midline and the superior pubic ramus is more robust than the inferior pubic ramus
Siding: isolated ischial regions
the thicker ramus faces the acetabulum
the thinner ramus is therefore anteroinferior
the surface of the ischial tuberosity faces posterolaterally
Siding: isolated iliac blades
the iliac pillar is lateral and is anteriorly displaces
the auricular surface and related structures are posterior and medial
Siding: isolated iliac crest
the iliac tubercle is anterior and lateral and the lateral surface anterior to it is more concave than the surface posterior to it
the crest sweeps posteromeidally from this point until is reaches the level of the anterior edge of the auricular surface and turns laterally
Siding: isolated acetabula
the acetabular notch is inferior and faces slightly anteriorly
the inferior end of the ācā made by the lunate surface is broader and more blunt than the superior end
the ischial ramus is posterior and the superior pubic ramus is anterior
the ilium is superior
Siding: isolated auricular surface
the auricular surface is posterior on the ilium and faces medially
its apex points anteriorly and the roughened reface for the sacroiliac ligaments is posterosupeiror
the greater and lesser sciatic notches are posterinferior