Erector spinae

A crucial group of muscles responsible for maintaining posture and stability of the spine.

Erector spinae refers to a collective group of muscles located along the vertebral column. It comprises three primary muscle columns: the iliocostalis, longissimus, and spinalis. These muscles extend from the sacrum and lower back area to the cervical spine, making them integral for movements and support of the spine.

Terminologia Anatomica

erector-spinae

System

Musculoskeletal system

Function

The erector spinae muscles play a vital role in extending the spine and maintaining an upright posture. Their primary function is to control the extension and lateral flexion of the vertebral column, allowing for significant movement while offering stability. Additionally, they help in supporting the actions of bending and twisting at the waist, contributing to overall mobility. In daily activities, the erector spinae assists in movements such as lifting, reaching, and maintaining balance, ensuring that the spine can withstand the body’s weight and any external forces applied during various tasks.

Location

The erector spinae muscles are located bilaterally along the entire length of the spine, spanning from the sacrum in the lower back through to the cervical vertebrae in the neck. These muscles are divided into three separate groups: the iliocostalis, which is the outermost layer attaching the ribs; the longissimus, situated in the middle, extending from the lower spine to the skull; and the spinalis, the closest to the spine, focusing mainly on the vertebrae themselves. This arrangement allows for both regional and extensive coverage of the spinal column, providing strong support against gravity and enabling a wide range of movements.

Did You Know?

The erector spinae is sometimes referred to as the 'antigravity' muscle because of its role in counteracting the force of gravity on the spine.
These muscles are highly active during activities that require lifting or maintaining a standing position, illustrating their essential role in everyday movements.
Strengthening the erector spinae can help reduce the risk of lower back pain, a common ailment in many adults.