Quadriceps

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Other Names Thigh (Front) Quads Heads Rectus Femoris Vastus Lateralis (Externus) Vastus Intermedius Vastus Medialis (Internus) Movement Knee Extension [1, 2, 3, 4 ] Hip Flexion [1 ] Attachments Origin Ilium [1 ] Illiac Spine (Anterior Inferior) Femur Lateral Surface [2 ] Anterior Suface [3 ] Medial Suface [4 ] Insertion Tibia [1, 2, 3, 4 ] Tuberosity Patellar Tendon Patellar Related Muscles Iliopsoas Pectineus Sartorius Tensor Fasciae Latae

Comments The biarticulate rectus femoris [1 ] enters passive insufficiency through the completion of knee flexion when the hips are more extended or through the completion of hip extension when the knees are more flexed. The biarticulate rectus femoris [1 ] enters active insufficiency through the completion of knee extension when the hips are more flexed (other heads of the quadriceps [2, 3, 4 ] become more active) or through the completion of hip flexion when the knees are more extended (other hip flexors become more active). See vastus medialis weakness [4]. Also see pulley-like arrangements in body.