Pelvic Girdle

Question 1

what is the purpose of the pelvic girdle?

Answer 1

anchor LE to axial skeleton; base for LE movement

Question 2

what are the bones involved in the pelvic girdle?

Answer 2

sacrum and innominate bones

Question 3

what is the sacrum composed of?

Answer 3

5 fused vertebrae

Question 4

what are the landmarks of the sacrum?

Answer 4

Base
Apex
Median sacral crest

Question 5

what are the 3 innominate bones?

Answer 5

ilium, ischium, pubis

Question 6

what are the landmarks of the innominate bones?

Answer 6

ASIS
PSIS
Pubic symphysis
Ischial tuberosities
Iliac crests

Question 7

what are the 2 joints of the pelvic girdle?

Answer 7

sacroiliac joints and pubic symphysis

Question 8

explain what kind of joint and the bones involved in sacroiliac joints

Answer 8

Bones: sacrum, R/L ilium
Diarthrodial (freely moving)

Question 9

explain what kind of joint and the bones involved in the pubic symphysis

Answer 9

Bones: R/L pubis
Amphiarthrodial (limited movement)

Question 10

what pelvic girdle movements occur in the sagittal plane?

Answer 10

Ant rotation
Post rotation

Question 11

what pelvic girdle movement occurs in the frontal/coronal plane?

Answer 11

R/L lateral rotation

Question 12

what kind of pelvic girdle movement occurs in the transverse plane?

Answer 12

R/L transverse rotation

Question 13

what happens with ant rotation of the pelvis?

Answer 13

ASIS ↓ ; PSIS ↑
Hip flexion / lumbar extension

Question 14

what happens with post rotation of the pelvis?

Answer 14

ASIS ↑ ; PSIS ↓
Hip extension / lumbar flexion

Question 15

what happens with right lateral rotation of the pelvis?

Answer 15

L ASIS + PSIS ↑
R ASIS + PSIS ↓

Question 16

what happens with left lateral rotation of the pelvis?

Answer 16

L ASIS + PSIS ↓
R ASIS + PSIS ↑

Question 17

what happens with right transverse rotation of the pelvis?

Answer 17

R ASIS lateral
L ASIS medial

Question 18

what happens with left transverse rotation of the pelvis?

Answer 18

R ASIS lateral
L ASIS medial

Question 19

what are the ant muscles that are involved with the pelvic girdle?

Answer 19

Iliopsoas
Pectineus
Sartorius

Question 20

what are the post muscles that are involved in the pelvic girdle?

Answer 20

Glut max
Glut med
Glut min
Tensor fasciae latae
External rotators

Question 21

what is the origin, insertion, movement, and innervation of the iliopsoas?

Answer 21

• Origin:
  Lumbar spine
  Base of sacrum
  Inner ilium
• Insertion: lesser trochanter
• Movement:
  Hip: flexion and ER
  Pelvis: ant tilt
  Lumbar spine: flexion and ipsilateral SB
• Innervation: femoral nerve (L2-L4)

Question 22

what is the origin, insertion, movement, and innervation of the sartorius?

Answer 22

• Origin: ASIS
• Insertion: anteromedial tibia
• Movement:
  Pelvis: ant tilt
  Hip: flexion, ER, ABD
  Knee: flexion
• Innervation: femoral nerve (L2-L4)

Question 23

what is the origin, insertion, movement, and innervation of the pectineus?

Answer 23

• Origin: pubis - pectineal line
• Insertion: femur - pectineal line
• Movement:
  Pelvis: ant tilt
  Hip: flexion, ER, ABD
• Innervation: femoral nerve (L2-L4)

Question 24

what is the origin, insertion, movement, and innervation of the gluteus maximus?

Answer 24

• Origin:
  Posterior iliac crest
  Posterior sacrum and coccyx
• Insertion:
  Gluteal tuberosity
  IT band
• Movement:
  Pelvis: post tilt
  Hip: extension, ER, ABD, ADD
• Innervation: inferior gluteal nerve (L5-S2)

Question 25

what is the origin, insertion, movement, and innervation of the gluteus medius?

Answer 25

- Origin: inferior to iliac crest (lateral ilium) - Insertion: greater trochanter (posterior/middle) - Movement: Hip: - ABD - IR and flex (ant fibers) - ER and ext (post fibers) Pelvis: - lat pelvic rot - ipsilateral - ant tilt (ant fibers) - post tilt (post fibers) - Innervation: superior gluteal nerve (L4-S1)

Question 26

what is the origin, insertion, movement, and innervation of the gluteus minimus?

Answer 26

- Origin: inferior to glut med (lateral ilium) - Insertion: greater trochanter (anterior) - Movement: hip: - ABD - IR - flexion Pelvis - lat pelvic tilt - ipsilateral - ant tilt - Innervation: superior gluteal nerve (L4-S1)

Question 27

what is the origin, insertion, and movement of the tensor fasciae?

Answer 27

- Origin: ant iliac crest - Insertion: IT band (gerdy’s tubercle) - Movement: Hip: - ABD - IR - flexion Pelvis: - lat pelvic rot - ipsilateral - ant tilt

Question 28

what are the external rotators of the pelvic girdle?

Answer 28

Piriformis Gemellus (sup and inf) Obturator (ext and int) Quadratus femoris

Question 29

a patient comes in with difficulty with ant tilt/hip flexion. what are some of the causes of this dysfunction?

Answer 29

Tight hip flexors - iliopsoas - rectus femoris weak/long hip extensors Abdominal weakness

Question 30

a patient comes in with difficulty with post tilt/hip extension. what are some of the causes of this dysfunction?

Answer 30

Tight hip flexors - hamstrings weak/long hip flexors Lumbar extensor weakness