Which structures form the origin of the trapezius muscle?

Which structures form the origin of the trapezius muscle?

• A. Nuchal ligament, spinous processes C7-T12, occipital protuberance
• B. Clavicle and scapular spine
• C. Spinous processes T2-T5
• D. Thoracolumbar fascia

Answer: (A)

The question tests where the trapezius begins on the skeleton. The trapezius originates from the skull base and the upper spine region: the external occipital protuberance and the superior nuchal line of the occipital bone, the nuchal ligament running down the back of the neck, and the spinous processes from C7 through T12. From these origins, the muscle fibers spread to insert on the lateral third of the clavicle, the acromion, and the spine of the scapula to move the shoulder girdle. Clavicle and scapular spine are insertion points, not origins, so they don’t describe where the muscle starts. A limited range like only T2–T5 misses most of the midline attachments, and the thoracolumbar fascia isn’t a trapezius origin.

The question tests where the trapezius begins on the skeleton. The trapezius originates from the skull base and the upper spine region: the external occipital protuberance and the superior nuchal line of the occipital bone, the nuchal ligament running down the back of the neck, and the spinous processes from C7 through T12. From these origins, the muscle fibers spread to insert on the lateral third of the clavicle, the acromion, and the spine of the scapula to move the shoulder girdle.

Clavicle and scapular spine are insertion points, not origins, so they don’t describe where the muscle starts. A limited range like only T2–T5 misses most of the midline attachments, and the thoracolumbar fascia isn’t a trapezius origin.