Which muscles cover the back of the neck and upper and middle regions of the back?

The trapezius and latissimus dorsi muscles are responsible for covering the back of the neck as well as the upper and middle regions of the back. The trapezius is a large, triangular muscle that extends from the back of the skull and cervical vertebrae down to the mid-thoracic spine, and it plays a crucial role in moving, rotating, and stabilizing the shoulder girdle and neck. The latissimus dorsi is a broad muscle that originates from the lower thoracic and lumbar regions and extends along the sides of the back, contributing significantly to movements of the shoulder and upper arm as well as providing support to the spine.

Both these muscles work together to enhance the mobility and strength of the upper body, making them essential in various physical activities. The trapezius alone acts on the neck, while the latissimus dorsi plays a significant role in the functionality of the back and shoulders, creating a comprehensive coverage over the specified areas. In the context of the question, their combined anatomical presence highlights their importance in supporting upper body posture and movement. Hence, this choice accurately identifies the muscles involved in the specified regions of the body.