Spinalis thoracis

Definition

The spinalis thoracis is a muscle located in the back, part of the erector spinae muscle group, which extends along the thoracic region of the spine. It functions primarily to extend and maintain the posture of the vertebral column.

Related terms

Erector Spinae: A group of muscles and tendons which run nearly the whole length of the spine, helping to extend and rotate the back.

Vertebral Column:

The part of the skeleton that includes all of the vertebrae, supporting the body's structure and protecting the spinal cord.

Extension:

A movement increasing the angle between body parts; when referring to the spine, it involves straightening or lifting up, counteracting bending or flexion