Muscles of Gluteal Region

Question 0

gluteus medius

Answer 0

O: ext surface of ilium b/w ant and post gluteal lines
I: lateral surface of greater trochanter
N: superior gluteal L4, L5, S1
A: abducts and medially rotates thigh;
keeps pelvis level when opposite leg is raised

Question 1

gluteus maximus

Answer 1

O: ilium post to post gluteal line; dorsal surface of sacrum and
coccyx; sacrotuberous ligament
I: most fibers end in IT band which enter into lateral condyle of
tibia; some fibers insert of gluteal tuberosity of femur
N: inf gluteal L5, S1, S2
A: extends and assists in lateral rotation of thigh,

Question 2

gluteus minimus

Answer 2

O: ext surface of ilium b/w ant and inf gluteal lines
I: ant surface of greater trochanter
N: superior gluteal L4, L5, S1
A: abducts and medially rotates thigh;
keeps pelvis level when opposite leg is raised

Question 3

tensor fascia lata

Answer 3

O: ASIS, ant part of iliac crest
I: IT band which attaches to lateral condyle of tibia
N: superior gluteal L4, L5, S1
A: flexes thigh

Question 4

piriformis

Answer 4

O: ant surface of 2-4 sacral segments, sup margin of greater
sciatic notch, sacrotuberous ligament
I: sup border of greater trochanter
N: ant rami S1, S2
A: laterally rotates extended thigh, abduct flexed thigh,
stabilize hip joint

Question 5

obturator internus

Answer 5

O: pelvic surface of ilium and ischium, obturator membrane
I: medial surface of greater trochanter
N: nerve to obturator internus L5, S1
A: laterally rotate extended thigh, abduct flexed thigh,
stabilize hip joint

Question 6

superior gemelli

Answer 6

O: ischial spine
I: medial surface of greater trochanter
N: nerve to obturator internus L5, S1
A: laterally rotates extended thigh, abducts flexed thigh, 
	stabilizes hip joint

Question 7

inferior gemilli

Answer 7

O: ischial tuberosity 
I: medial surface of greater trochanter
N: nerve to quadratus femoris L5, S1
A: laterally rotates extended thigh, abducts flexed thigh, 
	stabilizes hip joint