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Set 9 Muscles Hip and Quadriceps Quadricep Muscle Group Quadricep Muscle Group Osgood-Schlatters Disease During activities that involve a lot of running and jumping, the pull of the front thigh muscles (quadriceps) can place tension on the tendon that connects the kneecap to the shinbone. In Osgood-Schlatter disease, the tendon may begin to pull away from the spot where it attaches to the shinbone, causing pain and swelling. Trochanter of Femur Intertrochanteric line of Femur Trochanter of Femur Vastus intermedius Vastus intermedius Origin: Proximal 2/3 of femur Insertion: superior border of patella and tibial tuberosity by patellar ligament Action: Extends leg at knee Vastus medialis Vastus medialis Origin: intertrochanteric line of femur; with tendon of adductors Insertion: medial border of patella and tibial tuberosity by patellar ligament Action: extends leg at knee Vastus lateralis Vastus lateralis Origin: upper intertrochanteric line of femur; with tendon of gluteus maximus Insertion: lateral border of patella and tibial tuberosity by patellar ligament Action: extends leg at knee Rectus femoris Rectus femoris Origin: iliac spine and brim of acetabulum of pelvis Insertion: upper border of patella and tibial tuberosity by patellar ligament Action: extends leg at knee and flexes thigh at hip Gluteus medius Gluteus medius Origin: outer surface of ilium Insertion: greater trochanter of femur (head) Action: abducts femur at hip and rotates medially; major lateral hip stabilizer Adductor longus Adductor longus Origin: front of pubis between crest and symphysis Insertion: middle 1/3 of femur Action: adducts thigh at hip; assists in thigh flexion and medial hip rotation