Kinesiology - Knee OIA's

Rectus Femoris Muscle origin

anterior inferior iliac spine, groove (posterior) above the acetabulum

Rectus Femoris Muscle insertion

Superior aspect of the patella and the patellar tendon to the tibial tuberosity

Rectus Femoris Muscle action

Flexion of
hip
Extension
of knee

Vastus Lateralis Muscle origin

intertrochanteric line, anterior and inferior borders of the greater trochanter, upper half of the linea aspera and the entire lateral intermuscular septum

Vastus Lateralis Muscle insertion

Lateral border of patella, patella tendon to tibial tuberosity

Vastus Lateralis Muscle action

Extension of knee

Vastus Intermedius Muscle origin

Upper two thirds of anterior surface of the femur

Vastus Intermedius Muscle insertion

upper border of patella and the patellar tendon to tibial tuberosity

Vastus Medialis Muscle origin

whole length of the linea aspera and medial condyloid ridge

Vastus Medialis Muscle insertionn

medial half of the upper border of the patella and the patellar tendon to the tibial tuberosity

Vastus Medialis Muscle action

Extension of knee

Hamstring muscle group

• Semitendinosus

• Biceps femoris

• Semimembranosus

Semitendinosus Muscle origin

Ischial tuberosity

Semitendinosus Muscle insertion

Upper anterior surface of tibia

Semimembranosus Muscle action

Flexion of knee

Extension of hip

Internal rotation of hip

Biceps Femoris Muscle origin

Ischial tuberosity, lower half of the linea aspera, lateral condyloid ridge, lateral condyle of tibia, head of fibula

Biceps Femoris Muscle insertion

lateral condyle of tibia, head of fibula

Biceps Femoris Muscle action

Flexion of knee

Extension of hip

External rotation of hip

Popliteus Muscle Origin

Posterior surface of the lateral condyle of femur

Popliteus Muscle insertion

Upper posterior medial surface of tibia

Popliteus Muscle action

Flexion of knee
Internal rotation of flexed knee