Bones and bony landmarks of the pelvis

Question 1

What 3 bones make up the pelvic girdle?

Answer 1

Sacrum

Coccyx

Innominate/hip/pelvic/coxal bone

Question 2

Which bone is the sacrum?

Answer 2

1

Question 3

Which bone is the coccyx?

Answer 3

2

Question 4

Which bones are the hip/pelvic/innominate/coxal bones?

Answer 4

3

Question 5

What shape is the sacrum, and how is it formed?

Answer 5

Sacrum is a triangular bone that is formed by fusion of the 5 sacral vertebrae

Question 6

How does the sacrum connect to the rest of the vertebral column?

Answer 6

It articulates with the last lumbar vertebral segment L5

Question 7

Where is the coccyx in relation to the sacrum?

Answer 7

The coccyx is positioned inferiorly to (below) sacrum

Question 8

What shape is the coccyx, and where is it positioned in the vertebral column?

Answer 8

Small, triangular bone that is the terminal end of the vertebral column

Question 9

What 3 bones fuse to form the hip bones?

Answer 9

Ilium
Ischium
Pubis

Question 10

Which bone is the ilium, and describe its location relative to the other hip bones and in the hip bone overall?

Answer 10

1, ilium is superior to ischium and pubis

Located superiorly in hip bone

Question 11

Which bone is the ischium, and describe its location relative to the other hip bones?

Answer 11

2, ischium is inferior to ilium and posterior to pubis

Located posteroinferiorly in hip bone

Question 12

Which bone is the pubis, and describe its location relative to the other hip bones?

Answer 12

3, pubis is inferior to ilium and anterior to ischium

Located anteroinferiorly in hip bone

Question 13

What structure separates the 3 hip bones, and what is the function of this structure?

Answer 13

Triradiate cartilage, the Y-shaped epiphyseal plate that develops into acetabulum

Question 14

Where is the sacroiliac joint in the hip bone, and how many are there overall in the pelvic girdle?

Answer 14

1, there are 2 sacroiliac joints overall in the pelvic girdle

Question 15

Where is the sacrococcygeal joint in the hip bone, and how many are there overall in the pelvic girdle?

Answer 15

3, there is one sacrococcygeal joint overall in the pelvic girdle

Question 16

Where is the pubic symphysis in the hip bone, and how many are there overall in the pelvic girdle?

Answer 16

4, there is one pubic symphysis overall in the pelvic girdle

Question 17

Where is the lumbosacral joint in the hip bone, and what vertebral segments articulate at this joint?

Answer 17

2, this joint the articulation between L5 and S1 vertebral segments

Question 18

Where is the hip joint in the pelvic girdle?

Answer 18

Between acetabulum and femoral head

Question 19

What is the pubic symphysis?

Answer 19

Fibrocartilaginous joint between articular surfaces on pubis in each hip bone

Question 20

Where is the iliac fossa, and describe its shape?

Answer 20

1, it is the inner concave surface of the ilium wing

Question 21

What muscle fills the iliac fossa in the pelvic girdle?

Answer 21

Iliac muscle

Question 22

Where is the gluteal surface, and describe its shape?

Answer 22

3, it is the outer convex surface of the ilium wing

Question 23

Where is the iliac crest, and describe what it is and 4 bony landmarks that it contains?

Answer 23

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

Question 24

Out of the 4 orange boxes, which is the anterior superior iliac spine?

Answer 24

1

Question 25

Out of the 4 orange boxes, which is the anterior interior iliac spine?

Answer 25

2

Question 26

Out of the 4 orange boxes, which is the posterior superior iliac spine?

Answer 26

4

Question 27

Out of the 4 orange boxes, which is the posterior inferior iliac spine?

Answer 27

3

Question 28

Where is the pubic tubercle, and what is it?

Answer 28

4, it is a rounded projection on the lateral end of the pubic crest, seen anteriorly

Question 29

Where is the superior pubic ramus, and what is it?

Answer 29

5, bony bar of pubis that forms superior border of obturator foramen

Question 30

Where is the inferior pubic ramus, and what is it?

Answer 30

6, bony bar of pubis that forms inferomedial border of obturator foramen

Question 31

Where is the obturator foramen, and what is it?

Answer 31

7, Large hole in between pubis and ischium

Question 32

Where are the greater and lesser sciatic notches, and what are they?

Answer 32

8, Concave dips in posteromedial border of ilium Greater sciatic notch is superior to lesser sciatic notch

Question 33

Where is the ischial tuberosity, and what is it?

Answer 33

9, V-shaped bone posteroinferior to obturator foramen

Question 34

What part of the pelvic girdle touches the surface that an individual sits on?

Answer 34

Ischial tuberosities

Question 35

Where is the iliac tuberosity?

Answer 35

10