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Teres Major

Teres major is a thick and oval-shaped muscle that lies in the upper arm. Although having similar names, Teres major is different in terms of actions and innervation when compared to the teres minor. It’s main function is to facilitate medial rotation of the arm and it

Internal Intercostal Muscles

The internal intercostal muscles are a set of skeletal muscles and are located between the ribs. There are eleven muscles on each side. Among the cartilages of the true ribs they begin anteriorly at the sternum in the intercostal spaces, as well as at the anterior extremities

External Intercostal Muscle

It originates through the lower border of the rib above and attaches to upper border of rib below. Structure The most superficial layer of rib cage and intercostal space is created by the external intercostal muscle. Its fibers are pointed downward and forward through the inferior border

Subcostalis Muscle

The Subcostales/Infracostales consist of muscular as well as aponeurotic fasciculi, which are generally only well-built within the lower portion of the thorax. Each one emerges via the inner surface of one rib, and is attached near its angle within the inner surface of the second or third

Transversus Thoracis Muscles

The transversus thoracis muscles are on the same level as the innermost intercostals and are located in the deep surface of the anterior thoracic wall. Origin The transversus thoracis muscles emerge from: The posterior side of the xiphoid process. The inferior portion of the sternum. The adjacent

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