Bones and Joints of Pelvis

Question 1

What kind of joint is the sacroiliac joint?

Answer 1

synovial joint

Question 2

What kind of joint is the pubic symphysis?

Answer 2

secondary cartilaginous joint

Question 3

What are the three hip bones?

Answer 3

Ilium, ischium, and pubis

Question 4

What landmarks are located on the superior margin of the iliac crest?

Answer 4

ASIS - anterior termination of crest

PSIS - posterior termination of crest

Question 5

What are the name of the three surfaces of the ilium

Answer 5

iliac fossa internally, gluteal surface externally, and sacral surface for the sacroiliac joint

Question 6

Where is the pectineal line?

Answer 6

on the superior surface of the pubis

Question 7

Which group of muscles attach to the ischial tuberosity?

Answer 7

Hamstrings

Question 8

Which part of the ischium delineates the greater and lesser sciatic notch?

Answer 8

ischial spine

Question 9

What is the boundary of obturator foramen?

Answer 9

rami of the pubis and ischium

Question 10

What is the prominent superior surface of the sacrum called?

Answer 10

sacral promontory

Question 11

What is on either side of the sacral promontory?

Answer 11

lateral masses called the alar

Question 12

T/F The greater pelvis is the true pelvis

Answer 12

False, it is the false pelvis as it is part of the posterior abdominal wall

Question 13

What is the boundary of the pelvic inlet?

Answer 13

superior pubic symphasis, pubic crest, pectineal line, arcuate line of ilium, sacroiliac joint, sacral promontory

Question 14

What is the most common pelvic type in 1) female 2) male

Answer 14

1) gynaecoid (50%)

2) android (30%) + anthropoid (20%)

Question 15

T/F Pelvic outlet, unlike the inlet, has consistent shape for both male and female

Answer 15

True, it is diamond shaped, from pubic symphasis to ischial tuberosity then to coccyx

Question 16

Where is the plane of least dimension?

Answer 16

between pelvic inlet and outlet, from S4 to base of pubic symphasis, while passing the ischial spine

Question 17

What are the three sacroiliac ligaments reinforcing the joint capsule?

Answer 17

anterior, posterior and interosseous sacroiliac ligaments

Question 18

Where does the iliolumbar ligament attach?

Answer 18

L5 to the ilium

Question 19

Where does the sacrotuberous ligament attach?

Answer 19

sacrum to the ischial tuberosity

Question 20

Where does the sacrospinous ligament attach?

Answer 20

sacrum to ischial spine

Question 21

Which foramen is sacrospinous ligament directly related to

Answer 21

sciatic foramen, which is delineated by notches, and closed off by ligament

Question 22

What actions can occur at the sacroiliac joint?

Answer 22

nutation - close pelvic inlet, open outlet

counter-nutation - open inlet, close outlet

Question 23

T/F There is a fibrocartilage disc in the pubic symphysis

Answer 23

True, in the centre. Secondary cartilaginous joint has hyaline plate + fibrocartilage in the centre

Question 24

What ligaments are found at the pubic symphysis?

Answer 24

superior pubic ligament above

inferior arcuate ligament below

Question 25

What is the pubic symphysis reinforced by?

Answer 25

criss crossing fibres from oblique abdo muscles + aponeurosis of rectus sheath and adductor longus