Pelvis and Thigh

Question 1

Quadriceps Femurs Group Origins

Answer 1

Rectus Femoris: AIIS
Vastus Medialis: Medial lip of linea aspera
Vastus Lateralis: Lateral lip of linea aspera, gluteal tuberosity and greater trochanter
Vastus Intermedius: Anterior and lateral shaft of femur

Question 2

Quadriceps Femurs Group Insertion

Answer 2

Tibial tuberosity (via the patella and patellar ligament)

Question 3

Quadriceps Femurs Group Action

Answer 3

All: Extend the knee

Rectus Femoris: Flex hip

Question 4

Biceps Femoris Origin

Answer 4

Long head: Ischial tuberosity

Short head: Lateral lip of linea aspera

Question 5

Biceps Femoris Insertion

Answer 5

Head of the fibula

Question 6

Biceps Femoris Action

Answer 6

Flex the knee
Laterally rotate flexed knee
Tilt the pelvis posteriorly
Long head: Extend the hip, Assist to laterally rotate hip

Question 7

Semitendinosus Origin

Answer 7

Ischial tuberosity

Question 8

Semitendinosus Insertion

Answer 8

Proximal, medial shaft of the tibia at per anserinus tendon

Question 9

Semitendinosus Action

Answer 9

Flex the knee
Medially rotate flexed knee
Extend hip
Medially rotate hip
Tilt pelvis posteriorly

Question 10

Semimembranosus Origin

Answer 10

Ischial tuberosity

Question 11

Semimembranosus Insertion

Answer 11

Posterior aspect of medial condyle of tibia

Question 12

Semimembranosus Action

Answer 12

Flex the knee
Medially rotate flexed knee
Extend hip
Medially rotate hip
Tilt pelvis posteriorly

Question 13

Gluteus Maximus Origin

Answer 13

Coccyx, edge of sacrum, posterior iliac crest, sacrotuberous and sacroiliac ligaments

Question 14

Gluteus Maximus Insertion

Answer 14

Iliotibial tract (upper fibers) and gluteal tuberosity (lower fibers)

Question 15

Gluteus Maximus Actions

Answer 15

All fibers:
Extends the hip
Laterally rotates hip
Abducts the hip
Lower fibers: Adduct the hip

Question 16

Gluteus Medius Origin

Answer 16

Gluteal surface of ilium, between posterior and anterior gluteal lines, just below iliac crest

Question 17

Gluteus Medius Insertion

Answer 17

Lateral aspect of greater trochanter

Question 18

Gluteus Medius Actions

Answer 18

All fibers: Abduct hip
Anterior: Flex hip, medially rotate hip
Posterior: Extend hip, Laterally rotate

Question 19

Gluteus Minimus Origin

Answer 19

Gluteal surface of the ilium between the anterior and inferior gluteal lines

Question 20

Gluteus Minimus Insertion

Answer 20

Anterior aspect of greater trochanter

Question 21

Gluteus Minimus Actions

Answer 21

Abduct hip, Medially rotate hip, Flex hip

Question 22

Adductor Magnus Origin

Answer 22

Inferior ramus of the pubis, ramus of ischium and ischial tuberosity

Question 23

Adductor Magnus Insertion

Answer 23

Medial lip of linea aspera and adductor tubercle

Question 24

Adductor Magnus Action

Answer 24

Adduct hip, Medially rotate hip
Flex hip
Posterior fibers: Extend hip

Question 25

Adductor Longus Origin

Answer 25

Pubic tubercle

Question 26

Adductor Longus Insertion

Answer 26

Medial lip of linea aspera

Question 27

Adductor Longus Action

Answer 27

Adduct hip, Medially rotate hip | Flex hip

Question 28

Adductor Brevis Origin

Answer 28

Inferior ramus of pubis

Question 29

Adductor Brevis Insertion

Answer 29

Pectineal line and medial lip of linea aspera

Question 30

Adductor Brevis Action

Answer 30

Adduct hip, Medially rotate hip | Flex hip

Question 31

Pectineus Origin

Answer 31

Superior ramus of pubis

Question 32

Pectineus Insertion

Answer 32

Pectineal line of femur

Question 33

Pectineus Action

Answer 33

Adduct hip, Medially rotate hip | Flex hip

Question 34

Gracilis Orgin

Answer 34

Inferior ramus of pubis

Question 35

Gracilis Insertion

Answer 35

Proximal, medial shaft of tibia at pes anserinus tendon

Question 36

Gracilis Action

Answer 36

Adduct hip, Medially rotate hip | Flex the knee, Medially rotate knee

Question 37

Tensor Fasciae Latae Origin

Answer 37

Iliac crest, posterior to ASIS

Question 38

Tensor Fasciae Latae Insertion

Answer 38

Iliotibial tract

Question 39

Tensor Fasciae Latae Action

Answer 39

Flex hip, medially rotate hip, Abduct hip

Question 40

Sartorius Origin

Answer 40

ASIS

Question 41

Sartorius Insertion

Answer 41

Proximal, medial shaft of the tibia at pes anserinus tendon

Question 42

Sartorius Action

Answer 42

Flex hip, Laterally rotate hip, Abduct hip | Flex knee, medially rotate the flexed knee

Question 43

Piriformis Origin

Answer 43

Anterior surface of sacrum

Question 44

Piriformis Insertion

Answer 44

Superior aspect of greater trochanter

Question 45

Piriformis Action

Answer 45

Laterally rotate hip, Abduct hip when hip is flexed

Question 46

Quadratus Femoris Origin

Answer 46

Lateral border of ischial tuberosity

Question 47

Quadratus Femoris Insertion

Answer 47

Intertrochanteric crest between greater and lesser trochanters

Question 48

Quadratus Femoris Action

Answer 48

Laterally rotate hip

Question 49

Obturator Internus Origin

Answer 49

Obturator membrane and inferior surface of obturator foramen

Question 50

Obturator Internus Insertion

Answer 50

Medial surface of greater trochanter

Question 51

Obturator Internus Action

Answer 51

Laterally rotate hip

Question 52

Obturator Externus Origin

Answer 52

Rami of pubis and ischium, obturator membrane

Question 53

Obturator Externus Insertion

Answer 53

Trochanteric fossa of femur

Question 54

Obturator Externus Action

Answer 54

Laterally rotate hip

Question 55

Gemellus Superior Origin

Answer 55

Ischial spine

Question 56

Gemellus Superior Insertion

Answer 56

Medial surface of greater trochanter

Question 57

Gemellus Superior Action

Answer 57

Laterally rotate hip

Question 58

Gemellus Inferior Origin

Answer 58

Ischial tuberosity

Question 59

Gemellus Inferior Insertion

Answer 59

Medial surface of greater trochanter

Question 60

Gemellus Inferior Action

Answer 60

Laterally rotate the hip

Question 61

Psoas Major Origin

Answer 61

Bodies and TPs of lumbar vertebrae

Question 62

Psoas Major Insertion

Answer 62

Lesser trochanter

Question 63

Psoas Major Actions

Answer 63

With origin flexed: Flex the hip, laterally rotate hip Insertion flexed: Flex trunk toward thigh, tilt pelvis anteriorly Unilaterally: Laterally flex lumbar spine

Question 64

Iliacus Origin

Answer 64

Iliac fossa

Question 65

Iliacus Insertion

Answer 65

Lesser trochanter

Question 66

Iliacus Action

Answer 66

Flex hip, laterally rotate (w/ origin fixed) | Flex trunk toward thigh, Tilt pelvis anteriorly (w/ insertion fixed)