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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

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

Endothoracic Fascia

The structures in the mediastinum are covered by loose connective tissue and it also lines the internal surface of the thoracic cavity. In order to form definite fibrous layers, it is condensed within certain areas. A continuous fibro-elastic membrane known as the endothoracic fascia is created by

Innermost Intercostal Muscles

Deepest intercostal muscles situated within the intercostal spaces are the Innermost intercostal muscles. Together with the internal intercostal muscles they constrict at the time of expiration in order to minimize the transverse area of the thoracic cavity. Origin Just above the costal groove, the innermost intercostal muscle

Muscles of Thorax

Internal Intercostalis Muscle 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

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