Manual 114-118: Muscles of Iliac and Gluteal Region

Question 1

origin psoas major

Answer 1

• transverse process lumbar vertebrae
• intervertebral discs last thoracic/all lumbar vertebrae
• tendinous arches

Question 2

insertion psoas major

Answer 2

• lesser trochanter femur medial to iliacus

- bursa separates tendon from pubis and hip joint capsule

Question 3

n psoas major

Answer 3

L2/3

Question 4

function psoas major

Answer 4

flex hip and lumbar spine

Question 5

where is psoas minor located?

Answer 5

anterior to psoas major

Question 6

origin psoas minor

Answer 6

T12/L1 vertebrae and intervertebral disc

Question 7

insertion psoas minor

Answer 7

iliopectineal eminence

iliac fascia

Question 8

n psoas minor

Answer 8

L1

Question 9

function psoas minor

Answer 9

flex lumbar spine

Question 10

origin iliacus

Answer 10

• upper 2/3 iliac fossa
• iliac crest to ASIS/AIIS
• superolateral ala
• sacroiliac lig
• iliolumbar lig

Question 11

insertion iliacus

Answer 11

base lesser trochanter femur

Question 12

n iliacus

Answer 12

femoral

Question 13

function iliacus

Answer 13

flex hip

Question 14

sometimes there is an iliacus minor (detached portion iliacus)- where does it attach?

Answer 14

0: ASIS
I: intertrochanteric line femur or iliofemoral ligament

Question 15

vertical fibers b/w iliac crest and superior gluteus maximus

Answer 15

gluteal aponeurosis

Question 16

origin gluteus maximus

Answer 16

• posterior gluteal line on ilium
• posterior surface of coccyx
• aponeurosis sacrospinalis m
• sacrotuberous lig
• gluteal aponeurosis (covering m body)

Question 17

insertion gluteus maximus

Answer 17

• IT band (proximal/superficial fibers)

- gluteal tuberosity (deep fibers)

Question 18

3 bursae on deep surface of gluteus maximus

Answer 18

• greater trochanter (largest)
• ischial tuberosity (most commonly missing)
• b/w tendon gluteus maximus and vastus lateralis

Question 19

n gluteus maximus

Answer 19

inferior gluteal n

Question 20

function gluteus maximus

Answer 20

extend thigh
lateral rotate
abduct thigh

Question 21

origin gluteus medius

Answer 21

• outer ilium b/w iliac crest adn posteriro gluteal line posteriorly
• anterior gluteal line anteriorly

Question 22

insertion gluteus medius

Answer 22

oblique bony ridge greater trochanter (laterally)

Question 23

n gluteus medius

Answer 23

superior gluteal n

Question 24

function gluteus medius

Answer 24

• abduct thigh
• medially rotate an extended hip
• anterior fibers: flex/medial rotate hip
• posterior fibers: lateral rotate hip
• **stabilizes the pelvis in movement

Question 25

what structures are b/w gluteus medius and minimus?

Answer 25

superior gluteal n and deep superior gluteal vessels

Question 26

origin gluteus minimus

Answer 26

- outer ilium b/w anterior and inferior gluteal line | - greater sciatic notch

Question 27

insertion gluteus minimus

Answer 27

- anterior greater trochanter (there is a bursa b/w tendon and greater trochanter)

Question 28

n gluteus minimus

Answer 28

superior gluteal n

Question 29

function gluteus minimus

Answer 29

- abduct hip - medially rotate extended hip - weak hip flexor * ** stabilizes pelvis during motion

Question 30

origin tensor fascia latae

Answer 30

anterior iliac crest near ASIS

Question 31

insertion tensor fascia latae

Answer 31

IT tract just distal to level of greater trochanter | - the IT attaches to the inferior lateral tibial condyle and forms part of knee capsule

Question 32

n tensor fascia latae

Answer 32

superior gluteal n

Question 33

function tensor fascia latae

Answer 33

- medially rotate hip | - hip flexor

Question 34

insertion piriformis

Answer 34

- superior greater trochanter posterior to obturator internus/gemelli

Question 35

n piriformis

Answer 35

S2 or S1/2

Question 36

function piriformis

Answer 36

- lateral rotator - abductor of flexed hip - assist hip extension

Question 37

origin obturator internus

Answer 37

- superior/inferior pubic rami - ischial ramus - ilial/ischial wall of true pelvis - obturator membrane

Question 38

where are the two bursa associated with obturator internus?

Answer 38

- through lesser sciatic foramen, right angle over bone b/w spine/tuberosity of ischium - b/w hip joint capsule and tendon

Question 39

insertion obturator internus

Answer 39

medial greater trochanter anterior to trochanteric fossa

Question 40

n obturator internus

Answer 40

n to obturator internus (L5-S1/2)

Question 41

function obturator internus

Answer 41

- lateral rotator - abductor of flexed hip - hip extension

Question 42

origin superior gemellus

Answer 42

outer surface ischial spine | partial fusion to obterator internus tendon

Question 43

insertion superior gemellus

Answer 43

medial greater trochanter

Question 44

n superior gemellus

Answer 44

n to obturator internus

Question 45

function superior gemellus

Answer 45

lateral rotator of hip

Question 46

larger of two gemelli

Answer 46

inferior gemellus

Question 47

origin inferior gemellus

Answer 47

superomedial ischial tuberosity | partial fusion to obturator internus tendon

Question 48

insertion inferior gemellus

Answer 48

medial greater trochanter

Question 49

n inferior gemellus

Answer 49

n to quadratus femoris

Question 50

function inferior gemellus

Answer 50

lateral rotator hip

Question 51

quadratus femoris is located b/w what two muscles

Answer 51

inferior gemellus and adductor magnus

Question 52

origin quadratus femoris

Answer 52

lateral edge ischial tuberosity

Question 53

insertion quadratus femoris

Answer 53

quadrate tubercle femur

Question 54

n quadratus femoris

Answer 54

n to quadratus femoris (L4-S1)

Question 55

function quadratus femoris

Answer 55

lateral rotator of hip | adduct hip

Question 56

m covering outer surface anterior pelvic wall

Answer 56

obturator externus

Question 57

origin obturator externus

Answer 57

ischium/pubis surrounding medial margin obturator foramen/membrane

Question 58

insertion obturator externus

Answer 58

trochnateric fossa femur

Question 59

n obturator externus

Answer 59

posterior division obturator n

Question 60

function obturator externus

Answer 60

lateral rotator hip | adduct hip