Rectus Abdominus Action: flex lumbar portion of vertebral column
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
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
Transverse Abdominus Action: Unilateral: lateral flexion of the vertebral column Bilateral: flexes vertebral column and compresses.
Lower Appendicular Skeleton Gluteus maximus Gluteus medius Sartorius Adductors longus Adductors magnus
Gluteus Maximus Actions: Extension and lateral rotation of hip (femur)
Gluteus Medius Actions: Abducts and medially rotates hip (femur); steadies pelvis
Sartorius Actions: Flexes, abducts and laterally rotates hip; flexes knee
Adductors longus Actions: Adduction of hip
Adductors magnus Actions: Adduction of hip
Rectus femoris: flexes hip (femur); extends knee
Vastus medialis: extends kneeVastus lateralis: extends knee
Gastrocnemius: plantar flexes ankle (foot); flexes knee
Soleus: plantar flexes ankle (foot); steadies leg when standing
Lower Appendicular muscles Xiaoyu Lu, Jonah Singer, Mike Granato (Group four)
Semimembranosus: extends hip (femur); flexes knee.
Semitendinosus: extends hip (femur); flexes knee.
Biceps femoris: flexes knee
Tibialis anterior : dorsiflexion and inversion of ankle (foot)