Master Your Back Muscles 2026 – Unravel Origins, Actions, and Innervate Success!

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.