Skip to main content

Unfortunately we don't fully support your browser. If you have the option to, please upgrade to a newer version or use Mozilla Firefox, Microsoft Edge, Google Chrome, or Safari 14 or newer. If you are unable to, and need support, please send us your feedback.

Publish with us
Extrinsic Muscles of Back (Left)
Muscular System

Extrinsic Muscles of Back (Left)

Musculi externi dorsi

Read more


The extrinsic muscles are one of two subgroups of muscles of the back, the other being the intrinsic muscles. These muscles lie superficial to the thoracolumbar fascia and the intrinsic muscles of back. Overall, the extrinsic muscles of back are involved in movements of the pectoral (shoulder) girdle, arm, and ribs.

The extrinsic muscles of back consist of the:

- trapezius;

- latissimus dorsi;

- rhomboid major;

- rhomboid minor;

- levator scapulae;

- serratus posterior superior;

- serratus posterior inferior.

Complete Anatomy
The world's most advanced 3D anatomy platform
Try it for Free

Learn more about this topic from other Elsevier products

Back Muscle

ScienceDirect image

What happens to the back muscles is that, as one shoulder is pulled forward by the muscles on one half of the back, the same muscles on the opposite side must relax (this is a physiological law).

Explore on ScienceDirect(opens in new tab/window)

Complete Anatomy

The world's most advanced 3D anatomy platform

Complete Anatomy