Parasternal Line

Parasternal line

The periosternal line (linea parasternalis, pna, bna, jna; synonym - parasternal line) is an imaginary vertical line running parallel to the sternum at a distance of about 2 cm from it.

The circumsternal line is drawn for orientation during topographic diagnosis and marking of areas of the chest. It passes through the second intercostal space and divides the anterior chest wall into two parts - the heart region (on the left) and the lung region (on the right).

When auscultating the heart and lungs, the parasternal line is used to localize auscultation points. It helps determine the projection of the heart valves and parts of the lungs onto the anterior chest wall.

Thus, the parasternal line is an important landmark when examining the organs of the thoracic cavity and performing various medical procedures.

The periosternal line is a fairly important element of the anatomy of the body, and its functions are especially important for the body as a whole. In this article we will take a closer look at the parasternal line and its features.

The peristernal (or parasternal) line can be defined as the vertical line that runs between the two thoracic openings. The line begins in the sternum at the base of the pectoral muscles and runs down and toward the side of the chest. The area around the parasternal line is an important site for the localization of various vital organs, such as the heart, lungs, pericardium, kidneys, and more.

Functions of the perithoracic line:

1. The pectoral muscles and cartilaginous structures of the chest are directed around the peristernal line to ensure stability of the chest during inhalation and exhalation. 2. Parasternal lines provide the boundary between the abdominal and thoracic cavities. 3. Place of entry and exit of the periothoracic artery and periothoracic vein. 4. Strategic location for removal of chest drainage for certain diseases (eg, tubercula