1. Iliopsoas (Psoas major & Iliacus)
Action
flexion at hip
flexion at lumbar intervertebral joints (psoas major only)

2. Gluteus Maximus Largest Actions
Extends and laterally rotates at hip joint

3. Gluteus Medius 2nd Largest Actions
Abduction and medial rotation at hip joint

4. Gluteus Minimus Smallest Actions abducts and medially rotates
SAME AS MEDIUS

5. Tensor Fasciae Latae (iliotibial or IT band)
Action
flexion and medial rotation at hip
lateral support of knee

6. Piriformis Origin Insertion Action sacrum femur (greater Trochanter)
lateral rotation and abduction at hip joint

7. Quadratus Femoris
Action
lateral rotation at the hip joint

8. Adductor Magnus Origin Insertion Action pubis & ischium
femur (linea aspera)
Action
altogether: adduction at hip joint
superior portion: flexion and medial rotation at hip
inferior part: extension and lateral rotation at hip

9. Adductor Longus Origin Insertion Action pubis femur (linea aspera)
adduction, flexion, and medial rotation at hip
same for adductor brevis

10. Adductor Brevis Origin Insertion Action pubis femur (linea aspera)
adduction, flexion, and medial rotation at hip
same for adductor longus

11. Pectineus Origin Insertion Action Pubis Femur
adducts, flexes, and medially rotates at hip

12. Gracilis Origin Insertion Action pubis tibia
flexes at knee, adducts and medially rotates at hip

13. Rectus Femoris Origin Insertion Action
anterior inferior iliac spine
Insertion
tibial tuberosity via patellar ligament
Action
extends at knee, flexes at hip
part of quadriceps femoris muscle group of anterior thigh

14. Vastus Lateralis Origin Insertion Action
femur
Insertion
tibial tuberosity via patellar ligament
Action
extension at knee joint
part of quadriceps femoris muscle group of anterior thigh

15. Vastus Medialis Origin Insertion Action
Femur
Insertion
tibial tuberosity via patellar ligament
Action
extension at knee joint
part of quadriceps femoris muscle group of anterior thigh

16. Vastus Intermedius Origin Insertion Action
femur
Insertion
tibial tuberosity via patellar ligament
Action
extension at knee joint
part of quadriceps femoris muscle group of anterior thigh

17. Sartorius Origin Insertion Action Anterior superior iliac spine tibia
flexion at knee
flexion and lateral rotation at hip

18. Biceps Femoris Origins Insertion Action
Long Head: ischial tuberosity
Short Head: femur
Insertion
Long Head: tibia
Short Head: head of fibula
Action
flexes knee, extends and laterally rotates hip
Part of Hamstring Muscle group (posterior thigh)

19. Semimembranosus Origin Insertion Action
ischial tuberosity
Insertion
medial tibia
Action
flexion at knee, extension and medial rotation at hip
Part of Hamstring Muscle group (posterior thigh)

20. Semitendinosus Origin Insertion Action
Ischial Tuberosity
Insertion
medial tibia
Action
flexion at knee, extension and medial rotation at hip
Part of Hamstring Muscle group (posterior thigh)

21. Tibialis Anterior Action dorsiflexion (flexion at ankle)
inversion of foot

22. Peroneals peroneus (fibularis) longus peroneus (fibularis) brevis
Actions
eversion of foot and plantar flexion (extension at ankle)

23. Gastrocnemius Origin Insertion Action femur
calcaneus via achille’s tendon
Action
plantar flexion (extension at ankle), inversion of foot, flexion of knee

24. Soleus Origin Insertion Action fibula & tibia
calcaneus via achille’s tendon
Action
plantar flexion (extension of ankle)

25. Popliteus
Action
medial rotation of tibia (or lateral rotation of femur)
flexion at knee

26. Extensor Digitorum Longus
Action
flexion at joints of toes 2-5

27. Extensor Hallucis Longus
Action
Flexion at great toe