origin insertion and actions - gym instructor

Quiz yourself by guessing what should be in each of the black rectangles below before clicking on it to display the answer.

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Muscles of leg

Origin

Insertion

Action

Gastrocnemius

Femur

Achilles tendon into the heel bone

Ankle Plantar flexion Knee flexion

Soleus

tibia & fibula

achilles tendon into the heel bone

ankle plantar flexion

tibialis anterior

tibia

inside of the foot

ankle dorsi flexion

bicep femoris

ischium & femur

tibia and fibula

knee flexion and hip extension (move thigh to rear)

rectus femoris

ilium

via the patella tendon to the tibia

hip flexion and knee extension

vastus intermedialis/vastus medialis/ vastus lateralis

femur

via the patella tendon to the tibia

knee extension

semi-tendinosus & semi-membranosus

ischium

tibia

hip extension & knee flexion

tensor fascia latae (outside of upper leg)

ilium

tibia

hip flexion * abduction