Hip & Pelvis

Question 1

Iliacus

Answer 1

O: Iliac fossa
I: Lesser trochanter
A: Hip flexion and external rotation
In: Femoral n.

Question 2

Psoas major

Answer 2

O: Vertebral bodies T12-L5 and intervertebral discs
I: Lesser trochanter
A: Hip flexion, hip external rotation; Lumbar extension and pelvic anterior tilt
In: Anterior rami of lumbar plexus

Question 3

Pectineus

Answer 3

O: Pectineal line of the pubis
I: Pectineal line of the femur
A: Hip adduction and flexion
In: Femoral and obturator nn.

Question 4

Gluteus maximus

Answer 4

Origin: Posterior surface of ilium; Sacrum via thoracolumbar fascia, and sacrotuberous ligament
I:
- Upper fibers: iliotibial tract on Gerdy’s tubercle (tibia)
- Lower fibers: gluteal tuberosity of femur
A: Hip Extension, external rotation
- Upper fibers: abduction
- Lower fibers: adduction
In: Inferior gluteal n.

Question 5

Gluteus medius

Answer 5

O: Posterior surface of ilium (superior 1/3)
I: Greater trochanter
A: Abduction
- Anterior fibers: flexion, internal rotation
- Posterior fibers: extension, external rotation
In: Superior gluteal n.

Question 6

Gluteus minimus

Answer 6

O: Between anterior and inferior gluteal line of ilium
I: Greater trochanter
A: Abduction
- Anterior fibers: flexion, internal rotation
In: Superior gluteal n.

Question 7

Piriformis

Answer 7

O: Sacrum
I: Greater trochanter
A: Abduction, external rotation, internal rotation
In: Sacral plexus

Question 8

Superior & Inferior Gemellus

Answer 8

O:
- Superior: spine of ischium
- Inferior: Ischial tuberosity
I: Obturator internus tendon
A: Hip Abduction, external rotation
In: Lumbosacral plexus

Question 9

Quadratus femoris

Answer 9

O: Ischial tuberosity
I: Intertrochanteric crest
A: Hip Adduction, external rotation
In: Lumbosacral plexus