1. Muscular System

2. Posterior muscle attachment & Actions

3. Trapezius Origin: Occipital bone and cervical and thoracic vertebrae
Insertion: spine of scapula and
clavicle
Movement/Action:
Upper fibers: elevate
Middle fibers: retract
Lower fibers: depress

4. Origin: scapula and humerus
Triceps Brachii
Origin: scapula and humerus
Insertion: ulna
Movement: extends forearm (elbow)

5. Latissimus Dorsi Origin: thoracic &
lumbar vertebra, sacrum, ilium, scapula, ribs
Insertion: intertubercular
groove of humerus
Movement:
extends,
adducts,
medially rotates shoulder

6. Gluteus Maximus, medius, and minimus

7. Gluteus Maximus Origin: Sacrum and ilium Insertion: Femur
Movement/Action:
Extends hip

8. Gluteus medius and minimus
Origin: ilium
Insertion: Femur
Movement/Action:
Extends hip

10. hamstrings
Biceps Femoris
Semitendinosus
Semimembranosus

11. Origin: ischium and femur
Biceps Femoris
Origin: ischium and femur
Insertion: tibia and fibula
Movement:
Extends and rotates hip,
flexes knee,
(Lateral side)

12. extends and rotates hip, flexes knee
Semitendinosus
Origin: ischium
Insertion: tibia
Movement:
extends and rotates hip,
flexes knee
(medial side)

13. Origin: Femur Insertion: calcaneus Movement/Action: plantar flexion
Gastrocnemius
Origin: Femur
Insertion: calcaneus
Movement/Action:
plantar flexion
knee flexion

16. Soleus Origin: Tibia and fibula Insertion: calcaneus Movement/Action:
plantar flexion

17. Quadriceps femoris Rectus Femoris Vastus Lateralis Vastus Medialis
Vastus Intermedius

18. Rectus femoris
Origin: pelvis, femur
Insertion: patella and tibia
Movement: extends knee, flexes hip

19. Vastus medials Vastus Lateralis Vastus intermedius
Origin: femur
Insertion: patella and tibia
Movement: extends knee