SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY
Neck and upper back muscles (pink) and nerves (yellow), computer artwork. The large opaque muscle covering most of the upper back is the trapezius. Attached to the spine at bottom right are the spinalis muscles. The muscle on the side of the skull is the sternocleidomastoid muscle, which acts to flex and rotate the neck.
Model release not required. Property release not required.