Lower Extremity Muscle Actions Flashcards
Psoas Major
Flexes and rotates thigh laterally
Iliacus
Flexes and rotates thigh laterally
Gluteus Maximus
Extends and rotates thigh laterally.
Helps lock knee in extension.
Tensor Fascia latae
Flexes and abducts thigh at the hip joint.
Helps lock knee in extension.
Adductor Longus
Adducts, rotates, and flexes thigh at the hip joint
Adductor Magnus
Adducts, flexes, rotates and extends thigh at the hip joint.
Piriformis
External rotation of thigh laterally and abducts.
Pectineus
Flexes and adducts thigh.
Gracilis
Adducts and medially rotates thigh.
Flexes leg at knee joint.
Adductor magnus, Adductor longus and pectineus.
Adducts the Femur.
Rectus Femoris
Extend the knee
Flexes the hip
Vastus Lateralis
Vastus Medialis
Vastus Intermedius
Extend the knee
Sartorius
Flexes knee.
Weakly Flexes Hip.
Abducts and laterally rotates thigh (Crossing your leg).
Biceps Femoris
Extends thigh at the hip.
Flexes the leg at knee joint
Semitendinosus
Semimembranosus
Extends the thigh at the hip.
Flexes leg at the knee.
Tibialis Anterior
Dorsiflexes and inverts foot.
Extensor Digitorum Longus
Dorsiflexes and everts foot
Extends toes
Fibularis (Peroneus) longus
Plantar flexes and everts foot
Gastrocnemius
Plantar flexes foot
Flexes leg at knee joint
Soleus
Plantar flexes foot
Tibialis Posterior
Plantar flexes and inverts foot
