What joints do the erector spinae cross?

Answer 1

The erector spinae muscles primarily cross the intervertebral joints of the spine, providing support and facilitating movements such as extension and lateral flexion of the vertebral column. They also influence the sacroiliac joints indirectly through their attachment to the pelvis. Additionally, the muscles can engage with adjacent joints like the ribs, contributing to thoracic stability and movement. Overall, their primary role is in the spinal region, but their influence can extend to nearby joints.