Bones and bony landmarks of the pelvis Flashcards
What 3 bones make up the pelvic girdle?
Sacrum
Coccyx
Innominate/hip/pelvic/coxal bone
Which bone is the sacrum?
1
Which bone is the coccyx?
2
Which bones are the hip/pelvic/innominate/coxal bones?
3
What shape is the sacrum, and how is it formed?
Sacrum is a triangular bone that is formed by fusion of the 5 sacral vertebrae
How does the sacrum connect to the rest of the vertebral column?
It articulates with the last lumbar vertebral segment L5
Where is the coccyx in relation to the sacrum?
The coccyx is positioned inferiorly to (below) sacrum
What shape is the coccyx, and where is it positioned in the vertebral column?
Small, triangular bone that is the terminal end of the vertebral column
What 3 bones fuse to form the hip bones?
Ilium
Ischium
Pubis
Which bone is the ilium, and describe its location relative to the other hip bones and in the hip bone overall?
1, ilium is superior to ischium and pubis
Located superiorly in hip bone
Which bone is the ischium, and describe its location relative to the other hip bones?
2, ischium is inferior to ilium and posterior to pubis
Located posteroinferiorly in hip bone
Which bone is the pubis, and describe its location relative to the other hip bones?
3, pubis is inferior to ilium and anterior to ischium
Located anteroinferiorly in hip bone
What structure separates the 3 hip bones, and what is the function of this structure?
Triradiate cartilage, the Y-shaped epiphyseal plate that develops into acetabulum
Where is the sacroiliac joint in the hip bone, and how many are there overall in the pelvic girdle?
1, there are 2 sacroiliac joints overall in the pelvic girdle
Where is the sacrococcygeal joint in the hip bone, and how many are there overall in the pelvic girdle?
3, there is one sacrococcygeal joint overall in the pelvic girdle
Where is the pubic symphysis in the hip bone, and how many are there overall in the pelvic girdle?
4, there is one pubic symphysis overall in the pelvic girdle
Where is the lumbosacral joint in the hip bone, and what vertebral segments articulate at this joint?
2, this joint the articulation between L5 and S1 vertebral segments
Where is the hip joint in the pelvic girdle?
Between acetabulum and femoral head
What is the pubic symphysis?
Fibrocartilaginous joint between articular surfaces on pubis in each hip bone
Where is the iliac fossa, and describe its shape?
1, it is the inner concave surface of the ilium wing
What muscle fills the iliac fossa in the pelvic girdle?
Iliac muscle
Where is the gluteal surface, and describe its shape?
3, it is the outer convex surface of the ilium wing
Where is the iliac crest, and describe what it is and 4 bony landmarks that it contains?
2, it is the thickened margin/border of the iliac wing and contains:
Anterior superior iliac spine
Anterior interior iliac spine
Posterior superior iliac spine
Posterior interior iliac spine
Out of the 4 orange boxes, which is the anterior superior iliac spine?
1
Out of the 4 orange boxes, which is the anterior interior iliac spine?
2
Out of the 4 orange boxes, which is the posterior superior iliac spine?
4
Out of the 4 orange boxes, which is the posterior inferior iliac spine?
3
Where is the pubic tubercle, and what is it?
4, it is a rounded projection on the lateral end of the pubic crest, seen anteriorly
Where is the superior pubic ramus, and what is it?
5, bony bar of pubis that forms superior border of obturator foramen
Where is the inferior pubic ramus, and what is it?
6, bony bar of pubis that forms inferomedial border of obturator foramen
Where is the obturator foramen, and what is it?
7, Large hole in between pubis and ischium
Where are the greater and lesser sciatic notches, and what are they?
8, Concave dips in posteromedial border of ilium
Greater sciatic notch is superior to lesser sciatic notch
Where is the ischial tuberosity, and what is it?
9, V-shaped bone posteroinferior to obturator foramen
What part of the pelvic girdle touches the surface that an individual sits on?
Ischial tuberosities
Where is the iliac tuberosity?
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