1. Rectus Abdominus Action: flex lumbar portion of vertebral column

2. External Oblique Action: Unilateral: lateral flexion of the vertebral column; rotation of vertebral column to opposite side Bilateral: flexes vertebral column and compresses abdominal wall

3. Internal Oblique: Action: Unilateral: lateral flexion of the vertebral column; rotation of the vertebral column to opposite side. Bilateral: flexes vertebral column and compresses abdominal wall

4. Transverse Abdominus Action: Unilateral: lateral flexion of the vertebral column Bilateral: flexes vertebral column and compresses.

5. Lower Appendicular Skeleton Gluteus maximus Gluteus medius Sartorius Adductors longus Adductors magnus

6. Gluteus Maximus Actions: Extension and lateral rotation of hip (femur)

7. Gluteus Medius Actions: Abducts and medially rotates hip (femur); steadies pelvis

8. Sartorius Actions: Flexes, abducts and laterally rotates hip; flexes knee

9. Adductors longus Actions: Adduction of hip

10. Adductors magnus Actions: Adduction of hip

11. Rectus femoris: flexes hip (femur); extends knee

12. Vastus medialis: extends kneeVastus lateralis: extends knee

13. Gastrocnemius: plantar flexes ankle (foot); flexes knee

14. Soleus: plantar flexes ankle (foot); steadies leg when standing

15. Lower Appendicular muscles Xiaoyu Lu, Jonah Singer, Mike Granato (Group four)

16. Semimembranosus: extends hip (femur); flexes knee.

17. Semitendinosus: extends hip (femur); flexes knee.

18. Biceps femoris: flexes knee

19. Tibialis anterior : dorsiflexion and inversion of ankle (foot)