Hip Q1

Question 1

Gluteus Maximus

Answer 1

Function: extends, abducts, and externally rotates hips; lateral stabilizer of hip joint and knee joint

Innervation: Inferior gluteal nerve (L5, S1, S2)

Origin: Fascia of gluteus medius and erector spinae, dorsal surface of sacrum, coccyx, and sacrotuberous ligament

Insertion: iliotibial tract and gluteal tuberosity of the femur

Question 2

Gluteus Medius

Answer 2

Function: Abducts hip; stabilizes pelvis over stance; anterior fibers: internal rotation of the hip; posterior fibers: external rotation of the hip

Innervation: Superior gluteal nerve (L4, L5, S1)

Origin: External surface of ilium

Insertion: greater trochanter of the femur

Question 3

Gluteus Minimus

Answer 3

Function: Abducts and medially rotates hip; stabilizes pelvis over stance

Innervation: Superior gluteal nerve (L4, L5, S1)

Origin: External surface of ilium

Insertion: greater trochanter of the femur

Question 4

Tensor Facia Latae

Answer 4

Function: Hip flexion, abduction, and internal rotation; stabilizes the knee in extension

Innervation: Superior Gluteal nerve (L4, L5, S1)

Origin: Crest of ilium

Insertion: Iliotibial tract of fascia lata

Question 5

Piriformis

Answer 5

Function: Hip external rotation with the extended femur; Hip abduction with flexed femur

Innervation: Branches from S1 and S2

Origin: Anterior surface of sacrum

Insertion: of greater trochanter of femur

Question 6

Obturator Internus

Answer 6

Function: Hip external rotation with the extended femur; Hip abduction with flexed femur

Innervation: Nerve to obturator internus (L5, S1)

Origin: Obturator membrane

Insertion: greater trochanter of femur

Question 7

Obturator Externus

Answer 7

Function: Hip external rotation with the extended femur; hip abduction with flexed femur

Innervation: Obturator nerve

Origin: Obturator membrane

Insertion: Trochanteric fossa of the femur

Question 8

Superior Gemilli

Answer 8

Function: Hip external rotation with the extended femur; Hip abduction with flexed femur

Innervation: Nerve to obturator internus (L5, S1)

Origin: External surface of ischial spine

Insertion: greater trochanter of femur

Question 9

Inferior Gamelli

Answer 9

Function: Hip external rotation with extended femur; hip abduction with flexed femur

Innervation: Nerve to quadratus femoris

Origin: ischial tuberosity

Insertion: greater trochanter of femur

Question 10

Quadrus Femoris

Answer 10

Function: Hip external rotation

Innervation: Nerve to quadratus femoris (L5, S1)

Origin: Lateral aspect of the ischium

Insertion: Intertrochanter crest of the femur