Erector Spinae

About

The erector spinae is a complex group of muscles and tendons that run along the spine, extending from the sacrum to the base of the skull. It is divided into three main columns: the iliocostalis, longissimus, and spinalis muscles. These muscles play a crucial role in maintaining posture, extending the vertebral column, and facilitating rotation and lateral flexion of the spine. The erector spinae works in conjunction with other muscles, such as the glutes, to provide stability and support during various movements. Each column of the erector spinae has distinct sections that correspond to different spinal regions. The iliocostalis and longissimus muscles are involved in bilateral extension and unilateral lateral flexion of the spine. The spinalis muscle, being the most medial, supports segmental movement and extension of the spine. The erector spinae muscles are innervated by the posterior branches of spinal nerves and are essential for daily activities that require spinal movement and stability. Overall, the erector spinae is vital for maintaining proper spinal alignment and facilitating a wide range of movements.