Extension of the Vertebral Column: Synergist & Antagonist Muscles

Extension of the Vertebral Column: Antagonist Muscle

External oblique (bilaterally)

Extension of the Vertebral Column: Antagonist Muscle

Iliacus (with the insertion fixed)

Extension of the Vertebral Column: Synergist Muscle

Iliocostalis (bilaterally)

Extension of the Vertebral Column: Antagonist Muscle

Internal oblique (bilaterally)

Extension of the Vertebral Column: Synergist Muscle

Interspinalis

Extension of the Vertebral Column: Synergist Muscle

Intertransversarii (bilaterally)

Extension of the Vertebral Column: Synergist Muscle

Latissimus dorsi (assists when arm is fixed)

Extension of the Vertebral Column: Synergist Muscle

Longissimus (bilaterally)

Extension of the Vertebral Column: Synergist Muscle

Multifidi (bilaterally)

Extension of the Vertebral Column: Antagonist Muscle

Psoas Major (with the insertion fixed)

Extension of the Vertebral Column: Synergist Muscle

Quadratus lumborum (assists)

Extension of the Vertebral Column: Antagonist Muscle

Rectus abdominis

Extension of the Vertebral Column: Synergist Muscle

Rotatores (bilaterally)

Extension of the Vertebral Column: Synergist Muscle

Semispinalis Capitis

Extension of the Vertebral Column: Synergist Muscle

Spinalis (bilaterally)