lower extremities muscles

Question 1

gluteus maximus

Answer 1

extends, laterally rotates thigh steadies thigh & assists in rising from sitting inferior gluteal nerve (L5-S2)

Question 2

gluteus medius

Answer 2

abducts, medically rotates thigh keep pelvis leveled when opposite leg raised superior gluteal nerve (L4-S1)

Question 3

gluteus minimus

Answer 3

abducts, medically rotates thigh keep pelvis leveled when opposite leg raised superior gluteal nerve (L4-S1)

Question 4

tensor fasciae latae

Answer 4

flexes thigh superior gluteal nerve (L4-S1)

Question 5

piriformis

Answer 5

abduct flexed thigh, laterally rotate extended thigh stabilize hip joint ventral rami S1-S2

Question 6

obturator internus

Answer 6

abduct flexed thigh, laterally rotate extended thigh stabilize hip joint nerve to obturator internus (L5-S2)

Question 7

superior gemellus

Answer 7

abduct flexed thigh, laterally rotate extended thigh stabilize hip joint nerve to obturator internus (L5-S2)

Question 8

inferior gemellus

Answer 8

abduct flexed thigh, laterally rotate extended thigh stabilize hip joint nerve to quadratus femoris (L4-S1)

Question 9

quadratus femoris

Answer 9

laterally rotate thigh stabilize hip joint nerve to quadratus femoris (L4-S1)

Question 10

semimembranosus

Answer 10

extends thigh, flex leg, medially rotate leg when knee is flexed extends trunk when thigh+leg flexed tibial division of sciatic nerve (L4-S3)

Question 11

semitendinosus

Answer 11

extends thigh, flex leg, medially rotate leg when knee is flexed extends trunk when thigh+leg flexed tibial division of sciatic nerve (L4-S3)

Question 12

biceps femoris (LONG head)

Answer 12

extends thigh, flexes leg, laterally rotate leg when knee is flexed tibial division of sciatic nerve (L4-S3)

Question 13

biceps femoris (SHORT head)

Answer 13

flexes leg, laterally rotate leg when knee is flexed common fibular division of sciatic nerve (L4-S2)

Question 14

sartorius

Answer 14

flex, laterally rotate, abduct thigh, flexes leg femoral nerve (L2-L4)

Question 15

iliopsoas

Answer 15

flex thigh stabilize hip joint, psoas postural muscle iliacus: femoral nerve (L2-L4) psoas major: ventral rami L1-L3

Question 16

rectus femoris

Answer 16

flexes thigh, extend leg steadies hip joint femoral nerve (L2-L4)

Question 17

vastas lateralis

Answer 17

extend leg femoral nerve (L2-L4)

Question 18

vastas intermedius

Answer 18

extend leg femoral nerve (L2-L4)

Question 19

vastas medialis

Answer 19

extend leg femoral nerve (L2-L4)

Question 20

pectinius

Answer 20

flexes, adducts, medially rotate thigh femoral nerve (L2-L4) + some obturator (L2-L4)

Question 21

adductor longus

Answer 21

adducts thigh obturator nerve L2-L4

Question 22

adductor magnus

Answer 22

adductor: adducts, flexes thigh hamstring: extends thigh adductor: obturator nerve L2-L4 hamstring: tibial division of sciatic nerve (L4-S3)

Question 23

adductor brevis

Answer 23

adducts thigh, minimally flexes thigh obturator nerve L2-L4

Question 24

gracilis

Answer 24

adducts thigh flexes, medially rotates leg obturator nerve L2-L4

Question 25

obturater externus

Answer 25

laterally rotates thigh, stabilize hip joint obturator nerve L2-L4