The Hip Lateral Rotators

Question 1

Name the lateral rotators of the hip.

Answer 1

Gluteus Maximus, Piriformis, Obturator Internus, Gemellus Superior, Gemellus Inferior, Quadratus Femoris, Obturator Externus.

Question 2

Gluteus Maximus origin.

Answer 2

Gluteal surface of the ileum, iliac crest of the innominate, coccyx sacrum and sacrotuberous ligament.

Question 3

Gluteus Maximus insertion.

Answer 3

Gluteal tuberosity of the femur. (1/4)
The rest (3/4) form the iliotibial tract

Question 4

Gluteus Maximus nerve supply.

Answer 4

Inferior gluteal nerve L5, S1, 2.

Question 5

Gluteus Maximus action.

Answer 5

Extension of the hip, extension of the knee through the iliotibial tract.

Question 6

Gluteus Maximus function.

Answer 6

Turning out your foot and rotating your trunk (when balancing on foot)

Question 7

Piriformis origin.

Answer 7

Front of the 2nd-4th sacral segments. Gluteal surface of the ileum and sacrotuberous ligament.

Question 8

Piriformis insertion.

Answer 8

Upper border and medial side of greater trochanter.

Question 9

Piriformis nerve supply.

Answer 9

Anterior Rami of the sacral plexus L5, S1, 2.

Question 10

Piriformis action.

Answer 10

Lateral rotation of the hip and abduction when sitting down.

Question 11

Piriformis function.

Answer 11

Turning out your foot an rotating your trunk (when balancing on foot)

Question 12

Obturator internus origin.

Answer 12

Internal surface of the obturator membrane and surrounding Bony margin of the innominate

Question 13

Obturator internus insertion.

Answer 13

Medial surface of the Greater Trochanter.

Question 14

Obturator internus nerve supply.

Answer 14

Nerve to obturator internus L5, S1, 2.

Question 15

Obturator internus action.

Answer 15

Lateral rotation of the hip and abduction when sitting.

Question 16

Obturator internus function.

Answer 16

Turning out your foot and rotating your trunk (when balancing on foot)

Question 17

Obturator externus origin

Answer 17

Obturator membrane and the adjoining edge of the ischiopubic ramus

Question 18

Obturator externus insertion.

Answer 18

Neck of the femur, medial side of greater trochanter

Question 19

Obturator externus nerve supply

Answer 19

Posterior branch of Obturator nerve L3, 4

Question 20

Obturator externus action.

Answer 20

Lateral rotation of hip and abduction when sitting.

Question 21

Obturator externus function.

Answer 21

Turning out your foot and rotating your trunk (when balancing on foot)

Question 22

Gemellus superior origin.

Answer 22

Gluteal surface of the ischial spine of the innominate

Question 23

Gemellus Superior insertion.

Answer 23

Medial surface of the Greater Trochanter.

Question 24

Gemellus superior nerve supply.

Answer 24

Nerve to quadratus femoris L4, 5, S1.

Question 25

Gemellus superior action.

Answer 25

lateral rotation and abduction when sitting.

Question 26

Gemellus superior function.

Answer 26

Turning out your foot and rotating your trunk (when balancing on foot)

Question 27

Gemellus inferior origin.

Answer 27

Upper part of the ischial tuberosity of the innominate.

Question 28

Gemellus inferior insertion.

Answer 28

Blends with obturator internus and attaches to medial surface of greater trochanter.

Question 29

Gemellus inferior nerve supply.

Answer 29

Nerve to quadratus femoris L4, 5, S1.

Question 30

Gemellus inferior action.

Answer 30

lateral rotation of hip and abduction in sitting.

Question 31

Gemellus inferior function.

Answer 31

Turning out your foot and rotating your trunk (when balancing on foot)

Question 32

Quadratus femoris origin.

Answer 32

Ischial tuberosity

Question 33

Quadratus femoris insertion.

Answer 33

Intertrochanteric crest.

Question 34

Quadratus femoris nerve supply

Answer 34

Nerve to the quadratus femoris (L5, S1)

Question 35

Quadratus femoris action

Answer 35

Lateral rotation and abduction when sitting.

Question 36

Quadratus femoris function.

Answer 36

Turning out your foot and rotating your trunk (when balancing on foot)