Pelvic Girdle Flashcards
what is the purpose of the pelvic girdle?
anchor LE to axial skeleton; base for LE movement
what are the bones involved in the pelvic girdle?
sacrum and innominate bones
what is the sacrum composed of?
5 fused vertebrae
what are the landmarks of the sacrum?
Base
Apex
Median sacral crest
what are the 3 innominate bones?
ilium, ischium, pubis
what are the landmarks of the innominate bones?
ASIS
PSIS
Pubic symphysis
Ischial tuberosities
Iliac crests
what are the 2 joints of the pelvic girdle?
sacroiliac joints and pubic symphysis
explain what kind of joint and the bones involved in sacroiliac joints
Bones: sacrum, R/L ilium
Diarthrodial (freely moving)
explain what kind of joint and the bones involved in the pubic symphysis
Bones: R/L pubis
Amphiarthrodial (limited movement)
what pelvic girdle movements occur in the sagittal plane?
Ant rotation
Post rotation
what pelvic girdle movement occurs in the frontal/coronal plane?
R/L lateral rotation
what kind of pelvic girdle movement occurs in the transverse plane?
R/L transverse rotation
what happens with ant rotation of the pelvis?
ASIS ↓ ; PSIS ↑
Hip flexion / lumbar extension
what happens with post rotation of the pelvis?
ASIS ↑ ; PSIS ↓
Hip extension / lumbar flexion
what happens with right lateral rotation of the pelvis?
L ASIS + PSIS ↑
R ASIS + PSIS ↓
what happens with left lateral rotation of the pelvis?
L ASIS + PSIS ↓
R ASIS + PSIS ↑
what happens with right transverse rotation of the pelvis?
R ASIS lateral
L ASIS medial
what happens with left transverse rotation of the pelvis?
R ASIS lateral
L ASIS medial
what are the ant muscles that are involved with the pelvic girdle?
Iliopsoas
Pectineus
Sartorius
what are the post muscles that are involved in the pelvic girdle?
Glut max
Glut med
Glut min
Tensor fasciae latae
External rotators
what is the origin, insertion, movement, and innervation of the iliopsoas?
- 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)
what is the origin, insertion, movement, and innervation of the sartorius?
- Origin: ASIS
- Insertion: anteromedial tibia
- Movement:
Pelvis: ant tilt
Hip: flexion, ER, ABD
Knee: flexion - Innervation: femoral nerve (L2-L4)
what is the origin, insertion, movement, and innervation of the pectineus?
- Origin: pubis - pectineal line
- Insertion: femur - pectineal line
- Movement:
Pelvis: ant tilt
Hip: flexion, ER, ABD - Innervation: femoral nerve (L2-L4)
what is the origin, insertion, movement, and innervation of the gluteus maximus?
- 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)
what is the origin, insertion, movement, and innervation of the gluteus medius?
- 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)
what is the origin, insertion, movement, and innervation of the gluteus minimus?
- 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)
what is the origin, insertion, and movement of the tensor fasciae?
- Origin: ant iliac crest
- Insertion: IT band (gerdy’s tubercle)
- Movement:
Hip: - ABD
- IR
- flexion
Pelvis: - lat pelvic rot - ipsilateral
- ant tilt
what are the external rotators of the pelvic girdle?
Piriformis
Gemellus (sup and inf)
Obturator (ext and int)
Quadratus femoris
a patient comes in with difficulty with ant tilt/hip flexion. what are some of the causes of this dysfunction?
Tight hip flexors
- iliopsoas
- rectus femoris
weak/long hip extensors
Abdominal weakness
a patient comes in with difficulty with post tilt/hip extension. what are some of the causes of this dysfunction?
Tight hip flexors
- hamstrings
weak/long hip flexors
Lumbar extensor weakness