LE muscle actions

Question 1

Rectus Femoris

Answer 1

Extends knee and flexes hip

Question 2

Vastus Lateralis

Answer 2

Extends knee

Question 3

Vastus medialis

Answer 3

Extends knee

Question 4

Vastus intermedius

Answer 4

Extends knee

Question 5

Sartorius

Answer 5

Flexion abduction ER of hip, flexes knee

Question 6

TFL

Answer 6

Hip flexion, abduction, IR

Question 7

Pectineus

Answer 7

IR, adduction, Weak hip flexion (post precautions muscle)

Question 8

Iliacus

Answer 8

Flexion/ER of the hip

Question 9

Psoas major

Answer 9

Flexion/ER of hip and lumbar flexion

Question 10

Adductor longus

Answer 10

Adduction, flexion, of hip

Question 11

Adductor brevis

Answer 11

Adduction, flexion, IR of the hip

Question 12

Adductor Magnus

Answer 12

Extends, adducts, IR hip

Question 13

Gracilis

Answer 13

Flexes knee, adducts/flexes hip

Question 14

Articularis genus

Answer 14

Retracts suprapatellar bursa and articulate capsule when extending knee

Question 15

Glute max

Answer 15

Extension and ER of hip, stabilizes hip with walking

Question 16

Glute med

Answer 16

Abducts and stabilizes hip with gait, extends and ER via post fibers, flexes and IR via anterior fibers (dynamic hip stabilizer)

Question 17

Glute min

Answer 17

Same as glute med, dynamic hip stabilizer

Question 18

Biceps femoris

Answer 18

Extends hip, flexes knee, ER knee to lock with open chain exercises

Question 19

Semitendinosus

Answer 19

Extends hip, flexes knee, IR to unlock knee extension with open chain exercises

Question 20

Semimembranosus

Answer 20

Extends hip, flexes knee, IR knee to unlock with open chain exercises

Question 21

Popliteus

Answer 21

Flexes and IR knee, Unlocks closed chain knee extension