Muscle, Iliocostalis Thoracis (M. Iliocostalis Thoracis, Pna)

The chest muscles play an important role in supporting the body and performing movements such as breathing, coughing and chewing. Among them, there is one anatomical muscle that is responsible for stabilizing the sternum and ribs - this is the iliac costal pectoralis (PNA) or the iliacus thoracis (ANAT).

Where is the muscle located? The iliocostalis pectoralis muscle is a part of the upper trapezius muscle and is part of its muscles. It runs from the lateral surface of the ilium to the anterior border of the 9th rib, on the right and left. Muscle fibers run around the bodies of the iliac and vertebral bones.

How does a muscle work? Basically, the iliacus pectoralis muscles work in connection with raising the chest and moving and shortening the ribs. Functioning is accompanied by compression of the intercostal spaces, which ensures a stable position of the ribs and sternum. Due to this, the patient cannot perform an act of contraction (pharyngeal) and stretch his head forward, since the iliac rib and sternum are pinched. Also, the tone of this muscle helps to fix the ribs and spine during inhalation and exhalation, and prevents light food debris from entering the respiratory tract.

Observed complications Particularly common myotonia is weakness of the pectoral muscles and undermining the supporting function of the ribs, therefore, if this strength weakens, the patient may experience painful chewing and breathing. In addition, injuries to the esophagus, larynx,