Lateral Rotators Of Hip

Question 1

Gluteus Maximus

Answer 1

Origin: post surface of ilium, sacrum and coccyx
Insertion: deep part to glute tuberosity of femur, superficial 2/3 of ITB

Innervation: L5-S2

Question 2

Piriformis

Answer 2

Origins: Anterior aspect of the sacrum at about S2-4, sacrotuberous ligament
Insertion: Superior and medial aspects of the greater trochanter

Innervation: Ant rami of sacral plexus L5-S2

Question 3

Sartorius

Answer 3

Origin: ASIS
Insertion: superomedial part of tibia (in front of semitend/grac)

Innervation: Femoral L2-3

Question 4

Quadratus Femoris

Answer 4

Origin: ischial tuberosity (just inf to acetabulum)
Insertion: quadrate tubercle on intertrochanteric crest

Innervation: branch of sacral plexus S1-2

Question 5

Obturator Internus

Answer 5

Origin: internal surface obturator membrane and surrounding bony margin
Insertion: med surface of greater trochanter of femur

Innervation: obturator internus nerve (L5–S2), a branch of sacral plexus