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Video #9: Leg Muscles 1. Name the 4 muscles of the anterior thigh. a) b) c) d) 2. True or false. All but one quad muscle inserts into the patellar tendon. 3. How many joints does the Rectus Femoris cross? 4. Which Quadricep Muscle is considered to be the tear drop shaped muscle? a) Vastus Intermedius b) Vastus Medialis c) Rectus Femoris d) Vastus Laterlais 5. True or false. There is only one quad muscle that originates from the femur. 6. Please fill out the table to answer the origin, insertion and action of the Quadricep Group. Quadricep Group Vastus Laterlais Origin Anterior inferior iliac spine Anterior and lateral shaft of femur 7. The Hamstrings are located on the Insertion Tibial tuberosity (via patellar tendon) Tibial tuberosity (via patellar tendon) Tibial tuberosity (via patellar tendon) Action Knee extension side of the body. 8. What are the two dominating actions of the hamstring group? Copyright © 2015 Fit Body Boot Camp 9. Which Hamstring muscle has two segments or bellies to it? 10. True or false. All hamstring muscle originate from the linea aspera. 11. True or false. The Biceps Femoris assists in external rotation of the hip and tibia. 12. Please fill out the table to answer the origin, insertion and action of the Hamstring Group. Hamstring Group Origin Ischial tuberosity Insertion Posterior aspect of medial condyle of tibia Head of fibula Ischial tuberosity Action Knee flexion, hip extension, posterior pelvic tilt Assists in hip/tibial external rotation Knee flexion, hip extension, posterior pelvic tilt Assists in hip/tibial external rotation Knee flexion, hip extension, posterior pelvic tilt Assists in hip/tibial medial rotation 13. Which muscle in the Calf Group crosses two joints in the lower leg? 14. In layman’s terms, the Calcaneal tendon is considered to be the and is responsible for controlling flow in the lower leg. 15. True or false. Both muscle groups insert into the same point. Copyright © 2015 Fit Body Boot Camp tendon 16. Please fill out the table to answer the origin, insertion and action of the Calf Group. Calf Group Origin Posterior line of the tibia and posterior aspect of head of fibula Insertion Calcaneus via calcaneal tendon Copyright © 2015 Fit Body Boot Camp Action Ankle Plantarflexion