What muscle extends from the spine around to the chest?

The latissimus dorsi is the muscle that extends from the spine around to the chest. This large, flat muscle is located on the back and plays a key role in various movements of the shoulder joint, such as adduction, extension, and internal rotation. It originates from the lower thoracic vertebrae, lumbar vertebrae, iliac crest, and the lower ribs, and it inserts into the intertubercular groove of the humerus.

This muscle's location and function make it integral not only for upper body strength but also for activities that involve reaching and pulling. Its broad coverage allows it to influence the movement of the upper arms and torso, providing support and structure as a stabilizer during many physical activities.

The other listed muscles have different locations and functions: the sartorius is a muscle in the thigh, the trapezius is located in the upper back and neck area, and the pectoralis major is situated in the chest but does not extend from the spine.