LE muscle actions Flashcards
Rectus Femoris
Extends knee and flexes hip
Vastus Lateralis
Extends knee
Vastus medialis
Extends knee
Vastus intermedius
Extends knee
Sartorius
Flexion abduction ER of hip, flexes knee
TFL
Hip flexion, abduction, IR
Pectineus
IR, adduction, Weak hip flexion (post precautions muscle)
Iliacus
Flexion/ER of the hip
Psoas major
Flexion/ER of hip and lumbar flexion
Adductor longus
Adduction, flexion, of hip
Adductor brevis
Adduction, flexion, IR of the hip
Adductor Magnus
Extends, adducts, IR hip
Gracilis
Flexes knee, adducts/flexes hip
Articularis genus
Retracts suprapatellar bursa and articulate capsule when extending knee
Glute max
Extension and ER of hip, stabilizes hip with walking
Glute med
Abducts and stabilizes hip with gait, extends and ER via post fibers, flexes and IR via anterior fibers (dynamic hip stabilizer)
Glute min
Same as glute med, dynamic hip stabilizer
Biceps femoris
Extends hip, flexes knee, ER knee to lock with open chain exercises
Semitendinosus
Extends hip, flexes knee, IR to unlock knee extension with open chain exercises
Semimembranosus
Extends hip, flexes knee, IR knee to unlock with open chain exercises
Popliteus
Flexes and IR knee, Unlocks closed chain knee extension
