Pelvic Bones/Joints

Question 1

SI Joint what kind of joint?

Answer 1

synovial

Question 2

what kind of joint is pubic symphysis?

Answer 2

cartilaginous

Question 3

what is in between greater and lesser sciatic notch?

Answer 3

ischial spine

Question 4

ischial tuberosity direction?

Answer 4

postero-inferior

Question 5

what does ramus of ischium connect?

Answer 5

connects ischial tuberosity posteriorly to pubis anteriorly

Question 6

what is above and below the body of pubis?

Answer 6

superior pubic ramus

inferior pubic ramus

Question 7

what is on the lateral edge of pubic crest?

Answer 7

pubic tubercle

Question 8

what is the promontory of sacrum?

Answer 8

anterior margin of S1

Question 9

what flanks the promontory of sacrum?

Answer 9

Ala

lateral masses of fused transverse processes of S1-5

Question 10

what demarcates the false from the true pelvis?

Answer 10

iliopectineal line

Question 11

starting with pubic symphysis, go in a circle and describe the bones for the true pelvis:

Answer 11

1. pubic symphysis
2. pubic crest
3. pectineal line of pubic bone
4. arcuate line of ileum
5. margin of ala
6. promontary

Question 12

what shapes of pelvic inlets are there?

Answer 12

gynaecoid: (wide) mostly women
anthropoid: male
android: male

Question 13

Compare male and female pelvis: General Structure

Answer 13

Female: thin light
Male: thick heavy

Question 14

Compare male and female pelvis: shape of inlet

Answer 14

Female: transverse oval
Male: heart shaped

Question 15

Compare male and female pelvis: obturator foramen

Answer 15

Female:oval
Male: round

Question 16

Compare male and female pelvis: acetabulum

Answer 16

Female: small
Male: large

Question 17

Compare male and female pelvis: subpubic arch

Answer 17

Female: obtuse angle
Male: acute angle

Question 18

Compare male and female pelvis: greater sciatic notch

Answer 18

Female:almost 90 degrees
Male: narrow inverted ‘V’

Question 19

how to tell male vs. female pelvis using acetabulum?

Answer 19

female: distance from acetabulum to pubic symphysis is greater than the width of the acetabulum.
Male: same

Question 20

edges of public outlet?

Answer 20

ant: pubic symphysis
post: tip of coccyx
laterally: ischial tubs

Question 21

the line from the base of pubic bone, through ischial spine to S4 is called?

Answer 21

plane of least dimensions

Question 22

what’s the purpose of the hammock-like pelvic floor?

Answer 22

helps turn baby’s head during birth

Question 23

Si joint has 3 ligaments supporting it:

Answer 23

1. anterior SI ligament
2. interosseous SI ligament
3. posterior SI ligament

Question 24

purpose of SI joint ligaments?

Answer 24

limit mobility

Question 25

3 Accessory ligaments of SIJ:

Answer 25

iliolumbar
Sacrospinous
sacrotuberous

Question 26

what ligaments outlines/closes the greater and lesser sciatic notches?

Answer 26

Sacrospinous

sacrotuberous

Question 27

nutation does what to inlet/outlet?

Answer 27

close inlet

open outlet

Question 28

counter-nutation does what to inlet/outlet?

Answer 28

open inlet

closes outlet

Question 29

pubic symphysis ligaments do what?

Answer 29

resists vertical forces

Question 30

2 pubic symphysis ligaments?

Answer 30

superior

inferior arcuate

Question 31

pubic symphysis reinforced by? 3 things

Answer 31

criss-crossing fibres from obliques, rectus sheath, adductor longus