arthrology of the pelvis

Question 1

name the bones that make up the pelvis

Answer 1

2 x innominate bones
sacrum
coccyx

Question 2

what 4 joints make up the pelvis

Answer 2

2 x sacroiliac joints
pubic symphysis
lumbosacral joint

Question 3

what is another name for the pelvic inlet

Answer 3

superior pelvic aperture

Question 4

what is another name for the pelvic outlet

Answer 4

inferior pelvic aperture

Question 5

what parts form the greater (false) pelvis?

Answer 5

superior aspects of ilia and pubi above the pelvic brim and anterior abdominal musculature

Question 6

what parts form the lesser (true) pelvis?

Answer 6

pubic symphysis and superior pubis ramus anteriorly
sacrum ad coccyx posteriorly
medially bodies and tuberosities of ischium

Question 7

classify the sacroiliac joint

Answer 7

anteriorly- synovial, modified plane, simple, multi-axial
posteriorly- fibrous

Question 8

classify the pubic symphysis joint

Answer 8

secondary cartilaginous

Question 9

classify the lumbosacral joint

Answer 9

anteriorly- secondary cartilaginous
posteriorly- synovial, plane, simple, multi-axial

Question 10

classify the sacrococcygeal joint

Answer 10

secondary cartilaginous OR synovial
-fibrous in old age

Question 11

what are the 6 main ligaments of the sacroiliac joint (SIJ)

Answer 11

anterior SIJ ligament
interosseous SIJ ligament
short posterior SIJ lig
long posterior SIJ lig
sacrotuberous lig
sacrospinous lig

Question 12

what is the role of the anterior SIJ ligament

Answer 12

resists posterior movements of the sacrum

Question 13

what is the role of the interosseous ligament

Answer 13

resists separation of the sacrum and ilium

Question 14

what is the role of the short posterior SIJ ligament

Answer 14

resists anterior movement of the sacrum

Question 15

what is the role of the long posterior SIJ ligament

Answer 15

resists downwards gliding of the sacrum

Question 16

what is the role of the sacrotuberous and sacrospinous ligaments

Answer 16

resist anterior rotation of the sacrum

Question 17

what are the 2 main ligaments of the lumbosacral joint

Answer 17

iliolumbar ligament and lumbosacral ligament

Question 18

what are the attachments of the iliolumbar ligament

Answer 18

tip of L5 transverse process to iliac crest

Question 19

what are the attachments of the lumbosacral ligament

Answer 19

lower border of L5 transverse process to ala of sacrum

Question 20

what movements do the lumbosacral joint ligaments limit

Answer 20

lateral flexion of the lumbar spine

Question 21

what are the functions of the pelvis

Answer 21

-weightbearing- while standing transfers weight to the lower limbs,, during sitting transfers weight to the ischial tuberosities
-large bony surface for muscle attachment
- support and protection of viscera
- bony canal for childbirth