Week Eight OIA lower extremity

Question 1

Origin of Gluteus maximus

Answer 1

Coccyx, edge of sacrum, posterior iliac crest, sacrotuberous and sacroiliac ligaments

Question 2

Insertion of gluteus maximus

Answer 2

IT band (upper fibers) and gluteal tuberosity (lower fibers)

Question 3

Action of gluteus maximus

Answer 3

ALL: extend, abduct and laterally rotate the hip.
Lower: adduct hip

Everything except flexion and medially rotation

Question 4

Origin of gluteus Medius

Answer 4

The gluteal surface of the ilium, between posterior and anterior gluteal lines, is just below the iliac crest.

P-A
Middle of front and back

Question 5

Insertion of gluteus Medius

Answer 5

The lateral aspect of greater trochanter

Med = L

Question 6

Action of gluteus Medius

Answer 6

ALL: abduct, flex, medially rotate hip
POST: extend and laterally rotate hip

Expect adduction

Question 7

Origin of Gluteus Minimus

Answer 7

The gluteal surface of the ilium between the anterior and inferior gluteal lines

Part of AI
I’s in minimus = I in inferior

Question 8

Insertion of gluteus Minimus

Answer 8

The anterior aspect of greater trochanter

Min = anterior

Question 9

Action of gluteus minimus

Answer 9

Abduct, medially rotate, flexion of the hip

Question 10

Origin of psoas Major

Answer 10

Bodies and transverse process of lumbar vertebra

Question 11

Insertion of psoas major

Answer 11

Lesser trochanter

all the major S’s = Lesser

Question 12

Action of psoas major

Answer 12

Flexion, laterally rotate the hip.
Flex the trunk, ant tilt of the pelvis. Assist to laterally flex the lumbar spine.

Question 13

Origin of Psoas Minor

Answer 13

Body and transverse process of first lumbar vertebra

Question 14

Insertion of psoas Minor

Answer 14

Superior ramus of pubis

SRP

Question 15

Action of psoas Minor

Answer 15

assist in creating lumbar lordosis, post lilt of the pelvis

Question 16

Origin of Iliacus

Answer 16

iliac fossa

Question 17

Insertion of iliacus

Answer 17

Lesser trochanter

Question 18

Action of iliacus

Answer 18

flexion, laterally rotate. FIXED: flex trunk, ant pelvic tilt

Question 19

Origin of Piriformis

Answer 19

Anterior surface of sacrum

Question 20

Insertion of piriformis

Answer 20

The superior aspect of greater trochanter

Question 21

Action of piriformis

Answer 21

Laterally rotate the hip
(Abduct when hip flexed)

Question 22

Origin of Obturator internus

Answer 22

Obturator membrane and inferior surface of obturator foreman

Internus = inferior
Obturator = obturator membrane and foreman

Question 23

Insertion of obturator internus

Answer 23

Medial surface of greater trochanter

Question 24

Action of obturator internus

Answer 24

Laterally rotate hip

Question 25

Origin of obturator externus

Answer 25

Rami of pubis and ischium, obturator membrane

Question 26

Insertion of obturator externus

Answer 26

trochanteric fossa of femur

Question 27

Action of obturator externus

Answer 27

Laterally rotate the hip

Question 28

Origin of Gemellus superior

Answer 28

ischial spine ## Footnote Superior = spine

Question 29

Insertion of Gemellus superior

Answer 29

Medial surface of greater trochanter

Question 30

Action of Gemellus superior

Answer 30

Laterally rotate hip

Question 31

Origin of Gemellus inferior

Answer 31

ischial tuberosity ## Footnote Inferior = ischial

Question 32

Insertion of Gemellus inferior

Answer 32

Medial surface of greater trochanter

Question 33

Action of Gemellus inferior

Answer 33

Laterally rotate hip

Question 34

Origin of quadratus femoris

Answer 34

Lateral border of ischial tuberosity ## Footnote Lateral gemellus inferior

Question 35

Insertion of quadratus femoris

Answer 35

Intertrochanteric crest

Question 36

Action of quadratus femoris

Answer 36

Laterally rotate hip