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.

Elsevier
Publish with us
Muscles of Thorax (Left)
Muscular System

Muscles of Thorax (Left)

Musculi thoracis

Read more

Description

There are many different muscles within the thoracic region, some of these muscles:

- only originate from thoracic structures and insert onto other regions (e.g., the upper limb and abdominal regions);

- only insert onto thoracic structures and originate from other regions (e.g., the head and neck regions);

- both originate from and insert onto thoracic structures.

Muscles that only originate from or only insert onto thoracic structures are described as “muscles overlying the thoracic wall.” These muscles are not classified as muscles of the thorax, but are instead classified as muscles of the head, neck, upper limb, and abdomen. Such muscles include the sternocleidomastoid, scalenes, pectoralis major, pectoralis minor, serratus anterior, external abdominal oblique, and rectus abdominis muscles.

Muscles that both originate from and insert onto thoracic structures are described as “muscles within the thoracic wall.” These muscles are classified as the muscles of the thorax, and consist of the:

- intercostals;

- subcostals;

- transversus thoracis;

- levatores costarum.

These muscles elevate and depress the ribs and provide support to the structures of the thorax.

For classification purposes, the diaphragm is also considered one of the muscles of the thorax.

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

Learn more about this topic from other Elsevier products

Thoracic Muscle

ScienceDirect image

They are primarily thoracic muscles that act on the lumbar spine with a long moment arm ideal for lumbar spine extension.

Explore on ScienceDirect(opens in new tab/window)

Thoracic muscle energy treatment - Osmosis Video Library

Osmosis image

Thoracic muscle energy treatment Videos, Flashcards, High Yield Notes, & Practice Questions. Learn and reinforce your understanding of Thoracic muscle energy treatment.

Explore on Osmosis(opens in new tab/window)

Complete Anatomy

The world's most advanced 3D anatomy platform

Complete Anatomy