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Unit 3 Kines Knee
Knee - Origin, Insertion, & Action
| Term | Definition |
|---|---|
| Rectus Femoris, Vastus Lateralis, Vastus Intermedius, Vastus Medialis | Action: Knee Extension (4) |
| Semimembranosus, Semitendinosus, and Popliteus | Action: Knee Flexion and Internal Rotation (3) |
| Gastrocnemius | Action: Knee Flexion |
| Gracilis | Action: Weak knee flexion and internal rotation |
| Biceps Femoris | Action: Knee Flexion and External Rotation |
| Gracilis | Origin: Anteromedial edge of the pubic ramus |
| Gastrocnemius | Origin: Posterior condyles of femur |
| Popliteus | Origin: Posterior surface of lateral condyle of femur |
| Semimembranosus, Semitendinosus, and Biceps Femoris | Origin: Ischial Tuberosity (3) |
| Vastus Medialis | Origin: Length of femur, medial condyloid ridge |
| Vastus Intermedius | Origin: Upper anterior surface of femur |
| Vastus Lateralis | Origin: Intertrochanteric line, greater trochanter |
| Rectus Femoris | Origin: Anterior, inferior iliac spine, groove above acetabulum |
| Rectus Femoris | Insertion: Superior patella, tibial tuberosity |
| Vastus Lateralis | Insertion: Lateral border of patella, tibial tuberosity |
| Vastus Intermedius | Insertion: Upper border of patella, tibial tuberosity |
| Vastus Medialis | Insertion: Medial half of upper border of patella, tibial tuberosity |
| Semitendinosus | Insertion: Anterior medial surface of tibia |
| Semimembranosus | Insertion: Posteromedial surface of tibial condyle |
| Popliteus | Insertion: Upper posterior medial surface of tibia |
| Gastrocnemius | Insertion: Posterior calcaneus |
| Gracilis | Insertion: Anterior medial surface of the tibia, just below the medial condyle |
| Biceps Femoris | Insertion: Lateral condyle of tibia, fibular head |