Waist muscles are specifically tasked with internal protection, creating a strong barrier wall around each of the organs housed in the abdominal cavity. They also enable good posture, stability, and movement of the trunk. Functioning together, they provide flexion, lateral bending, and rotation of the torso. Finally, they assist the body in breathing, digestion, and defecation.
Erector Spinae Muscle DEFINITION - What does Erector Spinae mean? Lying somewhat vertically in a groove along each side of the vertebral column, the erector spinae is