Gluteal Region

Question 1

Gluteus maximus

Answer 1

Origin: Area of ilium posterior to posterior gluteal line, posterior aspect of sacrum & coccyx, sacrotuberous ligament
Insertion: Tubercle iliotibial tract on tibia via ITB, gluteal tuberosity of femur
Action: Hip extension, external rotation, abduction
Innervation: Inferior gluteal nerve

Question 2

Gluteus medius

Answer 2

Origin: Area of ilium between anterior & posterior gluteal lines. (deep to glute max)
Insertion: Lateral aspect of greater trochanter of femur
Action: Hip internal rotation, abduction
Innervation: Superior gluteal nerve

Question 3

Gluteus minimus

Answer 3

Origin: Area of ilium between anterior & inferior gluteal lines. (deep to glute med & max)
Insertion: Anterolateral aspect of greater trochanter
Action: Hip internal rotation, abduction
Innervation: Superior gluteal nerve

Question 4

Piriformis

Answer 4

Origin: Pelvic surface of sacrum (anterolateral), sacrotuberous ligament
Insertion: Superior border of greater trochanter
Action: Hip external rotation, horizontal abduction (flexed hip)
Innervation: Nerve to piriformis

Question 5

Gemellus superior & inferior

Answer 5

Origin:
* Superior: Ischial spine
* Inferior: Ischial tuberosity

Insertion: Medial aspect of greater trochanter
Action: Hip external rotation, horizontal abduction
Innervation:
* Superior: Nerve to obturator internus
* Inferior: Nerve to quadratus femoris

Question 6

Obturator internus

Answer 6

Origin: Internal surface of obturator membrane
Insertion: Medial aspect of greater trochanter
Action: Hip external rotation, horizontal abduction
Innervation: Nerve to obturator internus

Question 7

Quadratus femoris

Answer 7

Origin: Lateral margin of ischial tuberosity
Insertion: Quadrate tubercle of femur
Action: Hip external rotation
Innervation: Nerve to quadratus femoris

Question 8

Tensor Fascia Latae

Answer 8

Origin: ASIS, anterior 1/3 of outer lip of iliac crest
Insertion: Tubercle of ITB on tibia, via iliotibial tract
Action: Assists in internal rotation, abduction, flexion @ hip
Innervation: SUperior gluteal n.