Pelvis

Question 1

Pelvis function

Answer 1

Supports upper body enabling movement in upright position

Bony rings encircling reproductive organs,bladder and rectum

Question 2

Bones

Answer 2

Four main ones:
-2x innominate bones
-sacrum
-cocyyx

Question 3

Innominate bones

Answer 3

-ilium
-pubis
-ischium

Question 4

Sacrum

Answer 4

Five fused vertebrae
Posterior wall of pelvic cavity

Question 5

Coccyx

Answer 5

Four fused vertebrae
Small triangular bone

Question 6

Pelvic variation

Answer 6

-gynaecoid (slim Apple)
-android (wider Apple)
-anthropoid (circular)
-platypelloid (extended oval)

Question 7

Symphysis pubis

Answer 7

Midline joint made from cartilage
Uniting left and right pubic joints

Question 8

Sacroiliac joints

Answer 8

Joins the sacrum to the iliac

Question 9

Sacrococcygeal joint

Answer 9

Base of coccyx with tip of the sacrum
Coccyx can be moved backwards to make more space for fetus head

Question 10

Ligaments

Answer 10

Bands of tissue connecting the bones of the pelvis to each other

Question 11

Sacroiliac ligaments

Answer 11

Joins the sacrum and iliac together

Question 12

Sacrotuberous ligaments

Answer 12

Joins the sacrum and the ischium

Question 13

Sacrococcygeal ligaments

Answer 13

Uniting the sacrum and coccyx

Question 14

Interpubic ligaments

Answer 14

Between the pubic bones

Question 15

True pelvis

Answer 15

Bony canal which fetus must pass during birth

Divided into brim, outlet and cavity

Question 16

Why does the pelvis expand during pregnancy?

Answer 16

-relaxin levels increase by 10X in pregnancy
-pelvic ligaments soften due to increased levels of progesterone and oestrogen
-collagen fibres are digested

Question 17

What causes pelvic girdle pain?

Answer 17

-pelvic joint softening causes instability
- coupled with strain causes pain