Muscles Involved
The erector spinae is a massive group of muscles that are prime movers of extension, lateral flexion, and spine rotation. It has 3 columns: the iliocostalis, longissimus, and spinalis muscles. These muscles stop someone from bending forward at the waist. They act powerful extensors to raise the trunk from a flexed position to an upright position.
Prime Mover: Erector spinae
Antagonist: Rectus abdominis muscle
Origin: Sacrum and Ilium
Insertion of Prime Mover: Spinous process of T1 and T2. Thoracic vertebrae and cervical vertebrae.
Purpose: Extends spine and trunk back
Prime Mover: Erector spinae
Antagonist: Rectus abdominis muscle
Origin: Sacrum and Ilium
Insertion of Prime Mover: Spinous process of T1 and T2. Thoracic vertebrae and cervical vertebrae.
Purpose: Extends spine and trunk back