Bony Pelvis Anatomy

Question 1

Iliac crest - which vertebral level region is it located?

Answer 1

L4

Question 2

Iliac crest runs from ____ to ____

Answer 2

From ASIS -> PSIS

Question 3

PSIS is located at which vertebral level?

Answer 3

S2 (where the dimples in the back are)

Question 4

Ischium

Answer 4

Forms the posteroinferior part of the hip bone

Question 5

Ischium - what are the 3 components

Answer 5

Ischiopubic ramus
Ischial tuberosity
Ischial spine

Question 6

Which component of the ischium do you sit on?

Answer 6

Ischial tuberosity

Question 7

Which nerve wraps around the ischial spine?

Answer 7

Pudendal nerve

Question 8

Pubis - what are the 4 components

Answer 8

Ischiopubic ramus
Pubic tubercle
Pubic arch
Superior pubic ramus

Question 9

What attaches to the pubic tubercle ?

Answer 9

Inguinal ligament

Question 10

Sacroiliac joint is stabilised by which ligaments?

Answer 10

Interosseous ligaments

Question 11

What type of joint is the hip?

Answer 11

Synovial

Question 12

What type of joint is the pubic symphysis?

Answer 12

Secondary cartilaginous

Question 13

During internal examination, how do you locate the ischial spines?

Answer 13

Palpable approximately at 4 and 8 o’clock positions about a finger breadth into the vagina

Question 14

Why is the location of the ischial spine an important landmark?

Answer 14

Relevant to administer anaesthesia to the perineum by causing pudendal nerve block

Question 15

At which vertebral level is the sacral promontory located?

Answer 15

S1

Question 16

Obturator foramen - where is this located?

Answer 16

The hole between the superior pubic rams and the ischiopubic ramus

Question 17

Sacrotuberous ligament - what are the attachments

Answer 17

Sacrum and ischial tuberosity

Question 18

Sacrospinous ligament - what are the attachments

Answer 18

Sacrum and ischial spine

Question 19

Sacrotuberous and sacrospinous ligaments contract/relax during pregnancy?

Answer 19

Relax

Question 20

Sacrotuberous and sacrospinous ligaments form which 2 foraminae?

Answer 20

Greater and lesser sciatic foraminae

Question 21

What is the course of the pudendal nerve in the pelvis? - enters/exits the greater sciatic foramen?

Answer 21

Exits the greater sciatic foramen

Question 22

When the pudendal nerve exits the greater sciatic foramen, where does it go?

Answer 22

curves round the sacrospinous ligament (where the ischial spine is located)

Question 23

The pudendal nerve enters/exits the lesser sciatic foramen?

Answer 23

Enters

Question 24

Components of the pelvic inlet?

Answer 24

Sacral promontory
Ilium
Superior pubic ramus
Pubic symphysis

Question 25

Components of the pelvic outlet?

Answer 25

Pubic symphysis 
Ischiopubic ramus 
Ischial tuberosities 
Sacrotuberous ligaments
Coccyx

Question 26

Females vs males: which sex has the larger AP and transverse diameter at the pelvic inlet and outlet?

Answer 26

Females

Question 27

Females vs males: which sex has a rounder greater sciatic foramen

Answer 27

Females

Question 28

Females vs males: which sex has a wider sub-pubic angle?

Answer 28

Females

• females: follow thumb and index finger round
• males: upside down peace sign

Question 29

Pelvic inlet shape is heart shaped in males/females?

Answer 29

Males

Question 30

Pelvic inlet shape is oval shaped in males/females?

Answer 30

Females

Question 31

Fractures tend to be singular/multiple in the bony pelvis?

Answer 31

Multiple

Question 32

Which artery and vein are located within the pelvis?

Answer 32

Common iliac artery and vein

Question 33

Which nerve passes through the obturator foramen?

Answer 33

Obturator nerve