Gluteal Muscles

Question 1

Tensor Fasciae Latae

Answer 1

O- Anterior Superior iliac spine
I- Iliotibial tract
N- Superior gluteal nerve
A- Flexes thigh

Question 2

Gluteus Maximus

Answer 2

O- Ilium, sacrum, coccyx, and sacrotuberous ligament
I- Iliotibial tract and gluteal tuberosity
N- Inferior gluteal nerve
A- Laterally rotates thigh, active during powerful extension (stairclimbing, getting up from squatting postion)

Question 3

Gluteus Medius

Answer 3

O- Ilium between anterior and posterior gluteal lines
I- Greater trochanter
N- Superior gluteal nerve
A- Posterior: abducts, extends, and laterally rotates thigh
Anterior: abduct, flexes, and medially rotates thigh

Question 4

Gluteus Minimus

Answer 4

O- Ilium between anterior and inferior gluteal lines
I- Greater trochanter
N- Superior gluteal nerve
A- Posterior: abducts, extends, and laterally rotates thigh
Anterior: abduct, flexes, and medially rotates thigh

Question 5

Piriformis

Answer 5

O- Sacral segments 2-4
I- Greater trochanter
N- S1-S2
A- Rotates thigh laterally, abducts thigh, holds head of femur in acetabulum

Question 6

Obturator Internus

Answer 6

O- Around the inside of the obturator foramen
I- Greater trochanter
N- Nerve to obturator internus
A- Rotates thigh laterally, holds head of femur in acetabulum

Question 7

Superior Gemellus

And Inferior Gemellus (Gemelli)

Answer 7

O- Superior: ischial spine
Inferior: ischial tuberosity
I- Greater trochanter
N- Superior: nerve to obturator internus
Inferior: nerve to quadratus femoris
A- Laterally rotates thigh (mostly stabilizes)

Question 8

Quadratus Femoris

Answer 8

O- Ischial tuberosity
I- Intertrochanteric crest
N- Nerve to quadratus femoris
A- Laterally rotates thigh