A flat, triangular muscle of the posterior shoulder and neck that shrugs the shoulder when flexed.
A substantial muscle with a diamond shape, stretching from the rear of the skull down to the lower spine within the chest region and spanning across the breadth of the shoulders. The trapezius muscle connects to the upper and posterior sections of the shoulder blade as well as the outermost part of the collarbone. It plays a role in upholding the neck and spine, and it is also engaged in arm movement.