NCIt definition : One of a pair of flat, large, triangular muscles that extend from the external occipital
protuberance and the medial third of the superior nuchal line of the occipital bone
to the middle of the back. The trapezius muscle is involved in moving the shoulder
and arm.;
Alternative definition : CDISC: One of a pair of flat, large, triangular muscles that extend from the external
occipital protuberance and the medial third of the superior nuchal line of the occipital
bone to the middle of the back. The trapezius muscle is involved in moving the shoulder
and arm. (NCI);