leg muscle functions

gastrocnemius

plantar flex foot; flex knee

soleus

plantar flexion of the foot

tibialis posterior

plantar flexion of the foot

flexor digitorum longus

plantar flex and invert foot; flex toes

gluteus maximus

extend thigh

gluteus medius

abduct thigh

gluteus minimus

abduct thigh

biceps femoris

extend and laterally rotate thigh, flex knee

semitendinosus

extend and medially rotate thigh, flex knee

semimembranosus

extend and medially rotate thigh; flex knee

rectus femoris

extend knee; flex thigh

vastus intermedius

extend knee

vastus lateralis

extend knee

vastus medialis

extend knee

sartorius

flex, abduct, and laterally rotate thigh, flex knee

gracilis

adduct thigh and flex knee

tibialis anterior

dorsiflex and invert foot

fibularis longus

plantar flex and evert foot

tensor fasciae latae

flex and abduct thigh

piriformis

abduct and laterally rotate thigh

iliopsoas

flex and laterally rotate thigh, flex torso

pectineus

adduct, flex, and medially rotate thigh

adductor magnus

adduct and medially rotate thigh, extend thigh at hip

adductor longus

adduct and medially rotate thigh, flex thigh at hip

adductor brevis

adduct and flex thigh

extensor digitorum longus

extends toes 2-5, dorsiflexion

extensor hallucis longus

dorsiflexion of the big toe

plantaris

flex knee, plantar flex foot

flexor hallucis longus

plantar flex foot, flex big toe