Anatomy of the Pelvis

Question 1

Which are the bones of the pelvic girdle?

Answer 1

R & L Innominate
Sacrum
(Coccyx is not included)

Question 2

What does the pelvic girdle do?

Answer 2

Weight bearing

Muscle attachment (lower limb, perineum, pelvis diaphragm, erectile tissue)

Protection of pelvic viscera

Question 3

Answer 3

Question 4

Answer 4

Question 5

Answer 5

Question 6

What is the name for the area of the pelvis where the hip bone sits?

Answer 6

Acetabulum

Question 7

What type of cartilage is found in the acetabulum?

Answer 7

Triradiate cartilage

Question 8

When do the innominate bones fuse?

Answer 8

Puberty

Question 9

Which bones make up the innominate bone?

Answer 9

Ischium
Ilium
Pubis

Question 10

Answer 10

Question 11

Answer 11

Question 11

Answer 11

Question 12

Answer 12

Question 13

What runs between the ASIS and PSIS?

Answer 13

Iliac crest

Question 14

What are the tuberosity and spine of the ischium important for?

Answer 14

Muscle attachment

Question 15

Answer 15

Question 16

How can you tell the difference between a M and F pelvis from the pubis bone?

Answer 16

By the pubic arch - the degree of the angle - M usually <70, F usually >80 degrees

Question 17

What is another name for the pecten pubis?

Answer 17

Pectineal line

Question 18

How many vertebrae make up the sacrum?

Answer 18

5 (fused)

Question 19

How many vertebrae make up the coccyx

Answer 19

3 (fused)

Question 20

How can the sacrum differ in M and F?

Answer 20

The promontory protrudes less in F to allow the passage of a baby through the birth canal

Question 21

Answer 21

Question 22

How many joints are in the pelvis?

Answer 22

5

Question 23

Name the joints of the pelvis.

Answer 23

Lumbrosacral
Zygapophysial
Sacrococcygeal symphysis
Sacroiliac (SIJ)
Pubic symphysis

Question 24

What type of joint is the lumbrosacral joint?

Answer 24

Secondary cartilaginous

Question 25

What type of joint is the zygapophysial?

Answer 25

Synovial

Question 26

What type of joint is the sacrococcygeal symphysis?

Answer 26

Secondary cartilaginous

Question 27

What type of joint is the sacroiliac?

Answer 27

Synovial (free movement) and fibrous syndesmosis (linked by strong ligaments)

Question 28

What are the three ligaments which support the sacroiliac joint?

Answer 28

Anterior sacro-iliac ligament Posterior sacroiliac ligament Interosseus sacro-iliac ligament

Question 29

Answer 29

Question 30

What type of joint is the pubic symphysis?

Answer 30

Secondary cartilaginous

Question 31

Which two ligaments support the pubic symphysis?

Answer 31

Superior pubic ligament Inferior pubic ligament

Question 32

Answer 32

Question 33

What do the ligaments of the pelvis do?

Answer 33

Reinforce the joints and make it stable to prevent excess movement

Question 34

What is an articular surface?

Answer 34

A smooth surface lined with cartilage

Question 35

Where does the illiacus muscle sit?

Answer 35

In the Iliac fossa

Question 36

What are the three foramina of the pelvis?

Answer 36

Obturator foramen Greater sciatic foramen Lesser sciatic foramen

Question 37

Which two ligaments stabilise the sacroiliac joint (SIJ) to form foramina?

Answer 37

Sacrotuberous ligament Sacrospinous ligament

Question 38

Answer 38

Question 39

What are the boundaries of the obturator foramen?

Answer 39

Obturator membrane Ischiopubic ramus Superior pubic ramus

Question 40

What are the boundaries of the greater sciatic foramen?

Answer 40

Greater sciatic notch Ischial spine Sacrospinous ligament Sacrotuberous ligament

Question 41

What are the boundaries of the lesser sciatic foramen?

Answer 41

Lesser sciatic notch Ischial tuberosity Ischial spine Sacrospinous ligament Sacrotuberous ligament

Question 42

Answer 42

Question 43

How can you differentiate between M & F pelvises?

Answer 43

(1). Pubic angle - wider in F (2) Pubic inlet - wider and circular in F, heart shaped in M (3) Sacral promontory - sticks out more in M (4) Ischeal spines - stick out further into the pelvis spines in M (5). M - pelvis thicker and heavier, with deeper greater and lesser pelvis spaces. (6) Pelvic outlet - bigger and wider in F (7) Obturator foramen - round in M, oval in F

Question 44

What is the superior opening of the pelvis?

Answer 44

Pelvic inlet

Question 45

What is the inferior opening of the pelvis?

Answer 45

Pelvic outlet

Question 46

Answer 46

Question 47

What is another name for the pelvic inlet?

Answer 47

Pelvic brim Superior pelvic aperture

Question 48

What are the boundaries of the pelvic inlet?

Answer 48

Sacral promontory Sacral alae Arcuate line Pecten pubis Pubic crest Pubic symphysis

Question 49

What is the linea terminalis composed of?

Answer 49

Arcuate line Pecten pubis Pubic crest

Question 50

What is another name for the pelvic outlet?

Answer 50

Inferior pubic aperture

Question 51

What are the boundaries of the pelvic outlet?

Answer 51

Pubic symphysis Pubic arch Ischial tuberosities Sacrotuberous ligament Coccyx

Question 52

Answer 52

Question 53

Where is the greater (false) pelvis found?

Answer 53

Superior to the pelvic inlet

Question 54

What does the greater (false) pelvis contain?

Answer 54

Peritoneal organs

Question 55

Where is the lesser (true) pelvis found?

Answer 55

Inferior to the pelvic inlet and superior to the pelvic outlet

Question 56

What does the lesser (true) pelvis contain?

Answer 56

Reproductive organs Urinary organs (bladder) GI organs (rectum) Neurovasculature

Question 57

Answer 57