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LE muscles- main actions
Movement Science 1- Physical Therapy
50
Science
Graduate
11/12/2009
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Term
psoas major
 Definition
hip flexion (origin fixed), trunk flexion (insertion fixed-as in sit up)
Term
psoas minor
 Definition
flexion of trunk and lumbar spine
Term
iliacus
 Definition
hip flexion, flexes pelvis on femur
Term
pectineus
 Definition
hip adduction
Term
gracilis
 Definition
hip adduction, knee flexion, medial rotation of knee
Term
adductor longus
 Definition
hip adduction
Term
adductor brevis
 Definition
hip adduction, hip flexion
Term
adductor magnus
 Definition
hip adduction
Term
gluteus maximus
 Definition
hip extension, hip external rotation, through IT band stabilizes knee
Term
gluetus medius
 Definition
hip ABD, hip ER and IR
Term
Gluteus minimus
 Definition
hip ABD, IR
Term
tensor fasciae latae
 Definition
Hip flex, IR, ABD
Term
piriformis
 Definition
hip ER
Term
obturator internus
 Definition
hip ER
Term
obturator externus
 Definition
hip ER
Term
gemellus superior
 Definition
hip ER
Term
gemellus inferior
 Definition
hip ER
Term
quadratus femoris
 Definition
hip ER
Term
biceps femoris
 Definition
knee flex, ER, hip ext (long head)
Term
semitendinosus
 Definition
knee flex, IR; hip ext
Term
semimembranosus
 Definition
knee flex and IR, hip ext
Term
sartorius
 Definition
hip ER, ABD, flex; knee flex and IR
Term
rectus femoris
 Definition
knee ext, hip flex
Term
vastus lateralis
 Definition
knee ext
Term
vastus intermedius
 Definition
knee ext
Term
vastus medialis
 Definition
knee ext
Term
articularis genus
 Definition
retracts synovial membrane during knee ext to prevent its entrapment between patella and femur
Term
popliteus
 Definition
knee flex, IR (origin fixed); hip ER (insertion fixed)
Term
tibialis anterior
 Definition
ankle DF, foot INV
Term
tibialis posterior
 Definition
foot INV
Term
gastrocnemius
 Definition
ankle PF, foot INV
Term
soleus
 Definition
ankle PF, foot INV
Term
plantaris
 Definition
ankle PF
Term
peroneus longus
 Definition
foot EVE
Term
peroneus tertius
 Definition
ankle DF, foot EVE
Term
extensor digitorum longus
 Definition
MP extention (of 4 lesser toes)
Term
extensor digitorum brevis
 Definition
MP extension of toes 2-4; MP ext of great toe (via most medial slip of tendon-also called ethe extensor hallucis brevis-no slip to 5th toe from EDBr)
Term
flexor digitorum longus
 Definition
MP, PIP, DIP flexion of toes 2-5
Term
flexor digitorum brevis
 Definition
MP and PIP flexion of toes 2-5
Term
abductor digiti minimi
 Definition
toe 5 ABD and MP flex
Term
flexor digiti minimi brevis
 Definition
toe 5 MP flex
Term
quadratus plantar
 Definition
DIP flexion of toes 2-5 (in synergy with FDL)
Term
lumbricales
 Definition
MP flexion of toes 2-5
Term
dorsal interossei
 Definition
abd of toes 2-4
Term
plantar interossei
 Definition
adduciton of toes 3-5
Term
extensor hallucis longus
 Definition
MP and IP extension
Term
flexor hallucis longus
 Definition
great toe IP flex
Term
flexor hallucis brevis
 Definition
great toe MP flex
Term
abductor hallucis
 Definition
abd of great toe
Term
adductor hallucis
 Definition
great toe ADD
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