1. Muscles of the Leg Scott.lehbauer@lethbridgecollege.ab.ca

2. Gluteus Maximus Origin outer surface of iliac crest Sacrum Coccyx Insertion Iliotibial tract Posterior femur Function Hip extension Gluteus Maximus

3. Gluteus Medius Origin Lateral surface of the ilium Insertion Greater trochanter of the femur Function Abducts the hip Gluteus Medius

4. Tensor Fascia Latae Origin Lateral surface of the iliac crest Insertion Iliotibial tract Function Abducts, flexes and medially rotates the thigh Tensor Fascia Latae

5. Gracilis Origin Inferior ramus of the pubis Insertion Medial surface of the tibia Function Adduction of the hip Flexes the leg at the knee Gracilis

6. Biceps Femoris Origin Ischial Tuberosity Linea aspera of femur Insertion Medial surface of the tibia Function Flexes the leg at the knee Extends the hip Biceps Femoris

7. Semitendinosus Origin Ischial tuberosity Insertion Head of the fibula Medial tibia Function Flexes knee Extends the hip Semitendinosus

8. Semimembranous Origin Ischial tuberosity Insertion Medial condyle of the tibia Function Flexes the knee Extends the hip Semimembranous

9. Adductor magnus Origin Ischial tuberosity Insertion Linea aspera of femur Function Adducts and extends hip Adductor Magnus

10. Adductor longus Origin Inferior ramus of the pubis Insertion Linea aspera of the femur Function Adducts and flexes the hip Adductor Longus

11. Iliacus Origin Iliac fossa Insertion Lesser trochanter Function Flexes hip Iliacus

12. Psoas major Origin Transverse process of T12 – L5 Insertion Lesser trochanter Function Flexes hip Psoas major

13. Sartorius – the longest muscle in the body Origin Anterior Superior Iliac Spine Insertion Medial surface of the tibia Function Flexes the knee and hip Laterally rotates the hip “Crosses Legs” Sartorius

14. Rectus femoris Origin Anterior inferior iliac spine Insertion Tibial tuberosity by the patellar ligament Function Extends knee Flexes hip Rectus Femoris

15. Vastus lateralis Origin Greater trochanter of femur Insertion Tibial tuberosity by the patellar ligament Function Extends knee Vastus lateralis

16. Vastus medialis Origin Medial surface of the linea aspera of the femur Insertion Tibial tuberosity by the patellar ligament Function Extends the knee Vastus medialis

17. Vastus intermedius Origin Anterior and lateral surfaces of femur Insertion Tibial tuberosity by the patellar ligament Function Extends knee Vastus intermedius

18. Gastocnemius Origin Medial and lateral epicondyles of the femur Insertion Posterior surface of calcaneus via tendocalcaneus Function Plantar flexes the ankle Gastrocnemius

19. Soleus Origin Head of the fibula Shaft of the tibia Insertion Calcaneus via the tendocalcaneus Function Plantar flexes ankle Soleus

20. Tibialis anterior Origin Lateral condyle and the lateral surface of the tibia Insertion Base of the 1 st metatarsal and the medial cuneiform Function Dorsiflexes ankle and inverts foot Tibialis anterior

21. Extensor digitorum longus Origin Lateral condyle of the tibia and anterior surface of the fibula Insertion Toes 2-5 Function Extends toes 2-5 Dorsiflexes and everts foot Extensor Digitorum Longus

22. Peroneus Longus Origin Lateral condyle of tibia Head and shaft of fibula Insertion Tarsals and metatarsals Function Everts foot and plantar flexes ankle Peroneus Longus

23. Peroneus Brevis Origin Lateral margin of the fibula Insertion Base of the 5 th metatarsal Function Everts foot and plantar flexes ankle Peroneus Brevis

24. Biology 160 Muscles (Need to Know) Leg Lab 2 You will need to know the origins, insertions and functions for these muscles 1,2,4,5,6,7,8,9,11,12,17,18,19,20,21,22, Psoas Major and Iliacus