OINA of Lateral rotators of the thigh (semester 2 year 1)

Question 1

Piriformis

Answer 1

Lateral rotator of the thigh

O- Anterior surface of the sacrum, sacrotuberous ligament

I-Superior border of the greater trochanter of the femur

N- Nerve to piriformis

A- Laterally rotates extended thigh, abducts flexed thigh, stabelises the femoral head in the acetabulum

Question 2

Superior gemellus

Answer 2

Lateral rotator of the thigh

O- Ischial spine

I- Medial surface of the greater trochanter

N- nerve to obturator gemellus

A- Laterally rotates thigh, abducts flexed thigh, stabelises femoral head in the acetabulum

Question 3

Obturator internus

Answer 3

Lateral rotator of the thigh

O- Pelvic surface of the obturator membrane and surrounding bone

I- Medial surface of the greater trochanter of the femur

N- nerve to obturator internus

A- Laterally rotates thigh, abducts flexed thigh, stabelises femoral head in the acetabulum

Question 4

Inferior gemellus

Answer 4

Lateral rotator of the thigh

O- ischial tuberosity

I- Medial surface of the greater trochanter of the femur

N- nerve to quadratus femoris

A- Laterally rotates thigh, abducts flexed thigh, stabelises the femoral head in the acetabulum

Question 5

Quadratus femoris

Answer 5

Lateral rotator of the thigh

O- Lateral border of the ischial tuberosity

I-quadrate tubercle on the intertrochanteric crest of the femur

N-nerve to quadratus femoris

A-laterally rotates thigh, stabelises femoral head in acetabulum