Pelvic Girdle Flashcards

1
Q

what is the purpose of the pelvic girdle?

A

anchor LE to axial skeleton; base for LE movement

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2
Q

what are the bones involved in the pelvic girdle?

A

sacrum and innominate bones

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3
Q

what is the sacrum composed of?

A

5 fused vertebrae

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4
Q

what are the landmarks of the sacrum?

A

Base
Apex
Median sacral crest

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5
Q

what are the 3 innominate bones?

A

ilium, ischium, pubis

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6
Q

what are the landmarks of the innominate bones?

A

ASIS
PSIS
Pubic symphysis
Ischial tuberosities
Iliac crests

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7
Q

what are the 2 joints of the pelvic girdle?

A

sacroiliac joints and pubic symphysis

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8
Q

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

A

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

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9
Q

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

A

Bones: R/L pubis
Amphiarthrodial (limited movement)

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10
Q

what pelvic girdle movements occur in the sagittal plane?

A

Ant rotation
Post rotation

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11
Q

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

A

R/L lateral rotation

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12
Q

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

A

R/L transverse rotation

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13
Q

what happens with ant rotation of the pelvis?

A

ASIS ↓ ; PSIS ↑
Hip flexion / lumbar extension

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14
Q

what happens with post rotation of the pelvis?

A

ASIS ↑ ; PSIS ↓
Hip extension / lumbar flexion

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15
Q

what happens with right lateral rotation of the pelvis?

A

L ASIS + PSIS ↑
R ASIS + PSIS ↓

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16
Q

what happens with left lateral rotation of the pelvis?

A

L ASIS + PSIS ↓
R ASIS + PSIS ↑

17
Q

what happens with right transverse rotation of the pelvis?

A

R ASIS lateral
L ASIS medial

18
Q

what happens with left transverse rotation of the pelvis?

A

R ASIS lateral
L ASIS medial

19
Q

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

A

Iliopsoas
Pectineus
Sartorius

20
Q

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

A

Glut max
Glut med
Glut min
Tensor fasciae latae
External rotators

21
Q

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

A
  • 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)
22
Q

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

A
  • Origin: ASIS
  • Insertion: anteromedial tibia
  • Movement:
    Pelvis: ant tilt
    Hip: flexion, ER, ABD
    Knee: flexion
  • Innervation: femoral nerve (L2-L4)
23
Q

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

A
  • Origin: pubis - pectineal line
  • Insertion: femur - pectineal line
  • Movement:
    Pelvis: ant tilt
    Hip: flexion, ER, ABD
  • Innervation: femoral nerve (L2-L4)
24
Q

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

A
  • 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)
25
Q

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

A
  • 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)
26
Q

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

A
  • 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)
27
Q

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

A
  • Origin: ant iliac crest
  • Insertion: IT band (gerdy’s tubercle)
  • Movement:
    Hip:
  • ABD
  • IR
  • flexion
    Pelvis:
  • lat pelvic rot - ipsilateral
  • ant tilt
28
Q

what are the external rotators of the pelvic girdle?

A

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

29
Q

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

A

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

30
Q

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

A

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