Gluteal and Posterior Thigh Muscles

Question 1

Gluteus maximus m.

- I, A, N, B

Answer 1

I: upper part at iliotibial tract of fascia lata
lower part at gluteal tuberosity
A: chief extensor of thigh; lateral rotation of thigh; slight extension of leg when working with tensor fascia lata
N: inferior gluteal n.
B: superficial branch of superior gluteal a. and inferior gluteal a.

Question 2

gluteus medius m.

- I, A, N, B

Answer 2

I: lateral part greater trochanter of femur
A: thigh abduction and medial rotation
N: superior gluteal n.
B: deep branch of superior gluteal a.

Question 3

gluteus minimus m.

- I, A, N, B

Answer 3

I: anterior part of greater trochanter of femur
A: thigh abduction and medial rotation
N: superior gluteal n.
B: deep branch of superior gluteal a.

Question 4

tensor fascia lata m.

- O, I, A, N, B

Answer 4

O: anterior superior iliac spine
I: iliotibial tract
A: abduct, medially rotate, flex thigh; slight extension of knee
N: superior gluteal n.
B: deep branch of superior gluteal a.

Question 5

Iliotibial tract (IT Band)

• where does it run
• actions

Answer 5

runs from iliac tubercle to lateral tibial condyle

• assists decelerating adduction of thigh
• extends leg
• pulls patella laterally and stabilizes knee laterally

Question 6

Piriformis m.

- I, A, N

Answer 6

I: upper part of greater trochanter
A: laterally rotates on an extended hip; abducts on a flexed hip
N: nerve to the piriformis

Question 7

obturator internus m.

- O, I, A, N

Answer 7

O: inner surface obturator foramen
I: medial part of greater trochanter
A: lateral rotation of thigh when extended; abduction of thigh when flexed
N: nerve to obturator internus and superior gemellus (S1-S3)

Question 8

superior gemellus m.

- O, I, A, N

Answer 8

O: Ischial spine
I: medial part of greater trochanter
A: lateral rotation of thigh
N: nerve to obturator internus and superior gemellus (S1-S3)

Question 9

inferior gemellus m.

- O, I, A, N

Answer 9

O: ischial tuberosity
I: medial part of greater trochanter
A: lateral rotation of thigh
N: nerve to quadratus femoris and inferior gemellus

Question 10

obturator externus m.

- I, A, N

Answer 10

I: trochanteric fossa of femur; external margins of obturator
A: lateral rotation of thigh
N: obturator n.

Question 11

quadratus femoris m.

- I, A, N

Answer 11

I: intertrochanteric crest of femur
A: lateral rotation of thigh
N: nerve to quadratus femoris and inferior gemellus

Question 12

semimembranous m.

- O, I, A, N

Answer 12

O: ischial tuberosity
I: posterior part of medial condyle of tibia
A: extension of thigh and flexion of leg
N: tibial division of sciatic nerve

Question 13

semitendinosus m.

- O, I, A, N

Answer 13

O: ischial tuberosity
I: pes anserinus
A: extension of thigh, flexion of leg
N: tibial division of sciatic n.

Question 14

what are the three muscles that attach at the pes anserinus

Answer 14

gracilis m.
semitendinosus m.
sartorius m.

Question 15

biceps femoris m. long head

- O, I, A, N

Answer 15

O: ischial tuberosity
I: lateral head of fibula
A: flexion of leg, extension of thigh
N: tibial division of sciatic n.

Question 16

biceps femoris m. short head

- O, I, A, N

Answer 16

O: linea aspera
I: lateral head of fibula
A: flexion of leg at the knee; rotates tibia laterally
N: fibular branch of sciatic n.

Question 17

Hamstring portion of adductor magnus m.

- O, I, A, N

Answer 17

O: ischial tuberosity
I: adductor tubercle on medial epicondyle of femur
A: extension of thigh
N: tibial division of sciatic nerve