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The trapezius muscle is a flat, triangular muscle and belongs to the superficial back muscles. It plays an important role in the shoulder and head movements and is innervated by the accessory nerve (CN XI). The muscle has a descending (superior), transverse (middle) and ascending (inferior) part with different origins and insertions that allow different types of movements.

The aim of this video is to teach you the most important anatomy facts about the trapezius muscle including its function, origin, insertion and innervation.

In this video tutorial, we cover the following aspects of the trapezius muscle:
0:15 nerve supply by the accessory nerve (cranial nerve XI)
0:28 origins and insertions of the muscle's 3 parts: descending, transverse and ascending part
1:03 functions of the trapezius in the shoulder: shoulder stabilization, elevation and depression
1:22 functions of the trapezius muscle in the vertebral column: lateral and dorsal flexion of the head

Want to test your knowledge on the superficial back muscles? Take this quiz: https://khub.me/djqcr

Read more about the muscles of the back in this overview article on Kenhub, providing you a very useful summary for this essential muscle group: https://khub.me/timj1'>https://khub.me/timj1

For more engaging video tutorials, interactive quizzes, articles and an atlas of Human anatomy and histology, go to https://khub.me/runx0