Pelvis

Question 1

Function of Pelvis

Answer 1

• supports the weight of the body
• supports and protects viscera
• provides attachment for muscles
• bony birth canal in females

Question 2

Female pelvis shape

Answer 2

• adapted for childbearing
• true pelvis (inferior to pelvic brim) defines birth canal
• cavity of true pelvis is broad, shallow, and has greater capacity

Question 3

Male Pelvis shape

Answer 3

• tilted less far forward
• adapted for support of male’s heavier build and stronger muscles
• cavity of true pelvis is narrow and deep

Question 4

The joints of the pelvic girdle

Answer 4

• right and left sacroiliac joints (posterolaterally)
• symphysis pubis (anteriorly) or pubic symphysis
• Lumbosacral joint (superiorly)

Question 5

Sacroiliac ligaments

Answer 5

• short sacroiliac ligaments: composed of horizontal fibers extending from the sacrum to the posterior part of the iliac bone
• long sacroiliac ligaments: composed of fibers extending vertically from the sacrum to the posterior superior iliac spine

Question 6

Pubic symphysis

Answer 6

body, superior rami, inferior rami, obturator foramen

Question 7

Forces on Pubic Symphysis

Answer 7

Compression
Shear & torsion
Cutting
Kicking

Question 8

Lumbosacral joint

Answer 8

between the 5th lumbar vertebrae and sacrum

Question 9

Lumbosacral and Iliolumbar ligaments

Answer 9

• Lumbosacral ligament is a thick, fibrous band that extends from the anterior, inferior aspect of the transverse process of L5 to the lateral surface of the sacrum
• Iliolumbar ligaments extend from the transverse processes of L4 to L5 to the iliac crest

Question 10

Nerves of pelvis?

Answer 10

Spinal cord, Cauda equina, Sciatic nerve

Question 11

Motion of the pelvis

Answer 11

• Right lateral pelvic tilt posture
• Left lateral pelvic tilt posture
• Anterior pelvic tilt
• Posterior pelvic tilt

Question 12

Common pathologies for pelvis

Answer 12

-Pain from sciatica radiates from the buttock down the leg and can travel as far as to the feet and toes

Question 13

Common pathologies for pelvis

Answer 13

• Pain from sciatica radiates from the buttock down the leg and can travel as far as to the feet and toes
• Dehydrated disc
• Lumbosacral arthritis

Question 14

which 4 bones make up the pelvic girdle?

Answer 14

sacrum, coccyx, and 2 innominate bones

innominate bones (aka the hip bones or os coxae or Ala) are made up of the ilium, the ischium, and the pubis fused together into one bone

Question 15

False pelvis

Answer 15

greater or major pelvis

• is the bone area between the iliac crests and superior to the pelvic inlet
• there are no pelvic organs within the false pelvis

Question 16

True pelvis

Answer 16

lesser or minor pelvis

• lies between the pelvic inlet and the pelvic outlet
• the true pelvis area makes up the pelvic cavity
• contains portions of the GI tract, the urinary tract, and some reproductive organs
• In females, it makes up the birth canal

Question 17

The pelvis doesn’t include the ____

Answer 17

femur

Question 18

when people break their hip because they fell, it’s actually that they broke their hip and THEN fell

Answer 18

happens in osteoporetic older adults, they take a hard step off a curb or just a hard sit and they fracture it, so then they fall because of that break

Question 19

What is another name for the sacral motion that is sometimes referred to as sacral flexion?

Answer 19

Nutation (occurs when the base of the sacrum (on the superior end) moves anteriorly and inferiorly) (look at pg 283)

Question 20

SI joint motion

Answer 20

Nutation {sacral flexion}
Counternutation [sacral extension}
(look at pg 283)