Lower Extremity Muscles

Question 1

SA for Psoas Major?

Answer 1

Sides of bodies T12-L5, IV Discs, and TP of Lumbar Vertabrae.

Question 2

IA for Psoas Major?

Answer 2

Lesser trochanter of femur

Question 3

Action for Psoas Major?

Answer 3

Flexes Hip

Question 4

N of Psoas Major?

Answer 4

AR L1, L2

Question 5

PA for TFL?

Answer 5

ASIS and anterior part of iliac crest.

Question 6

DA for TFL?

Answer 6

Iliotibial Band (ITB) which inserts on gerdy’s tubercle on the lateral tibial condyle

Question 7

Action of TFL?

Answer 7

Abduct, internally rotates and flexes hip. Can assist with knee flexion/extension. (Via its insertion of ITB)

Question 8

N of TFL?

Answer 8

Superior gluteal nerve, L5

Question 9

PA of Sartorious?

Answer 9

ASIS and superior part of notch inferior to it

Question 10

DA for Sartorious?

Answer 10

Superior surface of medial tibia (pes anserine)

Question 11

A for Sartorious?

Answer 11

Hip flexion, abduction, external rotation, knee flexion and tibial internal rotation.

Question 12

N for sartorious?

Answer 12

Femoral Nerve L2, L3

Question 13

PA for Rectus Femoris?

Answer 13

AIIS and ilium superior to acetabulum

Question 14

DA for Rectus Femoris?

Answer 14

Quadriceps tendon, patella, tibial tubercle via patellar ligament

Question 15

A for Rectus Femoris?

Answer 15

Hip flexion, Knee extension

Question 16

N for Rectus Femoris?

Answer 16

Femoral L3, L4

Question 17

PA for Vastus Lateralis?

Answer 17

Linea aspera (lateral lip), greater trochanter

Question 18

DA for Vastus Lateralis?

Answer 18

Quadriceps tendon, patella, tibial tubercle via patellar ligament

Question 19

A for Vastus Lateralis?

Answer 19

Knee extension

Question 20

N for vastus Lateralis?

Answer 20

Femoral nerve L3, L4

Question 21

PA for Vastus Medius?

Answer 21

Linea Aspera (medial lip), intertrochanteric line

Question 22

PA for Vastus Medius?

Answer 22

Linea Aspera (medial lip), intertrochanteric line

Question 23

DA for Vastus medialis?

Answer 23

Quadriceps tendon, patella, tibial tubercle via patellar ligament

Question 24

A for vastus medialis?

Answer 24

Knee extension

Question 25

N for Vastus Medialis?

Answer 25

Femoral nerve L3, L4

Question 26

PA for Vastus intermedius?

Answer 26

Anterior and lateral shaft of femur

Question 27

DA for Vastus Intermedius?

Answer 27

Quadriceps tendon, patella, tibial tubercle via patellar ligament

Question 28

A for vastus intermedius?

Answer 28

Knee extension

Question 29

N for Vastus Intermedius?

Answer 29

Femoral Nerve L3, L4

Question 30

SA for Illiacus?

Answer 30

Illiac crest, Illiac fossa, Ala of sacrum, and anterior sacroilliac ligaments

Question 31

IA for Illiacus?

Answer 31

Lesser trochanter of femur (joins Psoas Major) and shaft inferior to it

Question 32

A for Illiacus?

Answer 32

Flexes hip

Question 33

N for Illiacus?

Answer 33

Femoral L2

Question 34

PA for Gluteus Maximus?

Answer 34

Illium posterior to posterior gluteal line, dorsal surface of sacrum and coccyx and sacrotuberous ligaments

Question 35

DA to gluteus Maximus?

Answer 35

ITB and gluteal tuberosity of femur

Question 36

A for gluteus maximus?

Answer 36

Extends and externally rotates hip.

Question 37

N for gluteus Maximus?

Answer 37

Inferior gluteal nerve S1, S2

Question 38

PA for gluteus medius?

Answer 38

External surface of ilium between anterior and posterior gluteal lines.

Question 39

DA for gluteus Medius?

Answer 39

Lateral surface of greater trochanter of femur

Question 40

A for gluteus medius?

Answer 40

Keeps pelvis level when ipsilateral surface is WB and contralateral limb is NWB Anterior fibers: abduct, flex and internally rotate the hip. Posterior fibers: abduct , extend and externally rotate hip.

Question 41

N for gluteus medius?

Answer 41

Superior gluteal nerve L5

Question 42

PA for Gluteus Minimus?

Answer 42

External surface of illium between anterior and inferior gluteal lines.

Question 43

DA for gluteus Minimus?

Answer 43

Anterior surface of greater trochanter of femur

Question 44

DA for gluteus Minimus?

Answer 44

Anterior surface of greater trochanter of femur

Question 45

A for gluteus minimus?

Answer 45

Abducts and internally rotates hip

Question 46

N for gluteus minimus?

Answer 46

Superior gluteal nerve L5

Question 47

PA for semitendinosus?

Answer 47

Ischial tuberosity

Question 48

DA for semitendinosus?

Answer 48

Superior surface of medial tibia (pes anserine)

Question 49

A for Semitendinosus?

Answer 49

Hip extension, knee flexion, tibial internal rotation

Question 50

N for semitendinosus?

Answer 50

Tibial nerve L5, S1

Question 51

PA for semimembranosus?

Answer 51

Ischial tuberosity

Question 52

DA for semimembranosus?

Answer 52

Posterior surface of medial tibial condyle, medial meniscus, oblique popliteal ligament to lateral femoral condyle.

Question 53

A for semimembranosus?

Answer 53

Hip extension, knee flexion, tibial internal rotation, retracts medial meniscus.

Question 54

N for semimembranosus?

Answer 54

Tibial nerve L5, S1

Question 55

PA for Biceps femoris Long head ?

Answer 55

Ischial tuberosity

Question 56

DA for biceps femoris long head?

Answer 56

Head of fibula

Question 57

A for Biceps femoris long head?

Answer 57

Hip extension, knee flexion, tibial external rotation

Question 58

N for biceps femoris Long Head?

Answer 58

Tibial nerve S1

Question 59

PA for Biceps Femoris Short head?

Answer 59

Lateral lip of linea aspera, lateral supraepicondylar line

Question 60

DA for Biceps Femoris Short Head?

Answer 60

Head of fibula

Question 61

A for biceps femoris Short head?

Answer 61

Knee flexion, tibial external rotation

Question 62

N for biceps femoris Short head?

Answer 62

Common fibular S1

Question 63

PA for tibialis Anterior?

Answer 63

Lateral condyle and superior lateral tibia and interosseous membrane.

Question 64

DA for Tibialis Anterior?

Answer 64

Medial and inferior surface of medial cuneiform and base of first metatarsal.

Question 65

A for Tibialis Anterior?

Answer 65

Ankle dorsiflexion and foot inversion

Question 66

N for tibialis Anterior?

Answer 66

Deep fibular L5

Question 67

PA for Extensor Hallicus Longus?

Answer 67

Middle surface of anterior fibula

Question 68

DA for Extensor Hallucis Longus?

Answer 68

Distal phalanx of Hallux (1st digit)

Question 69

A for Extensor Hallucis Longus?

Answer 69

MP and IP extension of hallux, ankle dorsiflexion

Question 70

N for Extensor Hallucis Longus?

Answer 70

Deep Fibular L5

Question 71

PA for Fibularis Longus?

Answer 71

Head and Superior lateral surface of fibula

Question 72

DA for fibularis Longus?

Answer 72

Base of 1st metatarsal, medial cuneiform

Question 73

A for Fibularis Longus?

Answer 73

Foot eversion, ankle plantarflexion (weak)

Question 74

N for fibularis Longus?

Answer 74

Superficial fibular L5, S1

Question 75

PA for fibularis brevis?

Answer 75

Inferior lateral surface of fibula

Question 76

DA for fibularis brevis?

Answer 76

Tuberosity of base of 5th metatarsal

Question 77

A for fibularis brevis?

Answer 77

Foot eversion, ankle plantarflexion (weak)

Question 78

N for fibularis brevis?

Answer 78

Superficial fibular L5, S1

Question 79

PA for Gastrocnemius?

Answer 79

Medial Head: Popliteal surface of femur superior to medial condyle Lateral Head: Lateral femoral Condyle

Question 80

DA for Gastrocnemius?

Answer 80

Calcaneus via calcaneal tendon

Question 81

A for gastrocnemius?

Answer 81

Knee flexion, Ankle plantarflexion

Question 82

N for gastrocnemius?

Answer 82

Tibial S1, S2

Question 83

PA for Soleus?

Answer 83

Head and superior surface of posterior fibula, soleal line and medial border of posterior tibia, and tendinous arches between bony attachments.

Question 84

DA for Soleus?

Answer 84

Calcaneus via calcaneal tendon

Question 85

A for soleus?

Answer 85

Ankle plantarflexion

Question 86

N for soleus?

Answer 86

Tibial S1, S2