Bony Pelvis

Question 1

Formation

Answer 1

Consists of 4 bones:
1. 2 hip bones
2. Sacrum
3. Coccyx
Bounded together by 4 joints and strong ligaments

Question 2

Formation: in front

Answer 2

2 hip bones articulate at symphysis pubis

Question 3

Formation: behind

Answer 3

Each hip bone articulates with sacrum at sacroiliac joint

Question 4

Formation: behind and below

Answer 4

Sacrum articulates with coccyx at sacrococcygeal joint

Question 5

Anatomical position

Answer 5

1. During standing, ASIS and symphysis pubis upper border lie in same vertical plane
2. Pelvic inlet plane makes an angle 50-60 degrees with horizontal plane

Question 6

Pelvic inlet: in front

Answer 6

1. Symphysis pubis
2. Pubic crest

Question 7

Pelvic inlet: lateral

Answer 7

Iliopectineal lines

Question 8

Pelvic inlet: behind

Answer 8

1. Sacrum Ala
2. Promontory

Question 9

Pelvic outlet

Answer 9

Corresponds to perineum region which is trunk lower end

Question 10

Pelvic outlet: shape

Answer 10

Diamond

Question 11

Pelvic outlet: anterior

Answer 11

Symphysis pubis lower border

Question 12

Pelvic outlet: on each side

Answer 12

1. Ischiopubic rami
2. Ischial tuberosity
3. Sacrotuberous ligaments

Question 13

Pelvic outlet: posterior

Answer 13

Coccyx tip

Question 14

Pelvic cavity divisions

Answer 14

Inlet plane divides pelvic cavity into:
1. False (greater) pelvis
2. True (lesser) pelvis

Question 15

False pelvis

Answer 15

1. Above pelvic inlet
2. Contains pelvic viscera
3. Bounded on each side by iliac fossa

Answer 16

1. Below pelvic inlet
2. Contains pelvic viscera
3. It has upper opening (pelvic inlet) and lower opening (pelvic outlet)

Question 17

True pelvis boundries

Answer 17

1. Anteroinferior: symphysis pubis and pubic rami
2. Posterior: sacrum and coccyx
3. Lateral: pelvic aspect of fused ilium and ischium

Question 18

Diameters

Answer 18

1. Anteroposterior
2. Transverse
3. Oblique

Question 19

Anteroposterior diameters of inlet

Answer 19

Between
1. Midpoints of sacral promontory
and
2. Symphysis pubis upper border

Question 20

Anteroposterior diameters of cavity

Answer 20

Between
1. Midpoints of S3 vertebra and
2. Symphysis pubis posterior surface

Question 21

Anteroposterior diameters of outlet

Answer 21

Between
1. Coccyx apex
To
2. Midpoint of symphysis pubis lower border

Question 22

Transverse diameters of inlet

Answer 22

Maximum distance between similar points on opposite sides of pelvic brim

Question 23

Transverse diameters of cavity

Answer 23

Widest transverse distance between cavity side walls

Question 24

Transverse diameters of outlet

Answer 24

Between 2 ischial tuberosities medial borders

Question 25

Oblique diameters of inlet

Answer 25

From 1. Iliopubic (iliopectineal) eminence To 2. Opposite sacroiliac joint

Question 26

Oblique diameters of cavity

Answer 26

From 1. One sacroiliac joint lowest point To 2. Contralateral Obturator membrane midpoint

Question 27

Oblique diameters of outlet

Answer 27

From 1. One side sacrotuberous ligament midpoint To 2. Contralateral ischiopubic junction

Question 28

Anteroposterior diameters: inlet male

Answer 28

10 cm

Question 29

Anteroposterior diameters: inlet female

Answer 29

11 cm

Question 30

Anteroposterior diameters: outlet male

Answer 30

8 cm

Question 31

Anteroposterior diameters: outlet female

Answer 31

12.5 cm

Question 32

Anteroposterior diameters: cavity male

Answer 32

10.5 cm

Question 33

Anteroposterior diameters: cavity female

Answer 33

13 cm

Question 34

Transverse diameters: inlet male

Answer 34

12.5 cm

Question 35

Transverse diameters: inlet female

Answer 35

13 cm

Question 36

Transverse diameters: outlet male

Answer 36

8.5 cm

Question 37

Transverse diameters: outlet female

Answer 37

11 cm

Question 38

Transverse diameters: cavity male

Answer 38

12 cm

Question 39

Transverse diameters: cavity female

Answer 39

12.5 cm

Question 40

Oblique diameters: inlet male

Answer 40

12 cm

Question 41

Oblique diameters: inlet female

Answer 41

12.5

Question 42

Oblique diameters: outlet male

Answer 42

10 cm

Question 43

Oblique diameters: outlet female

Answer 43

12 cm

Question 44

Oblique diameters: cavity male

Answer 44

11 cm

Question 45

Oblique diameters: cavity female

Answer 45

13 cm