What is sternalis?

Sternis is a muscles that is unusual, but sometimes found in the human chest. It lies vertically next to both sides of the chest or breast bone and covers the middle fibers of the main muscle pectoralis, those closest to the sternum. In women, there are less than ten percent of the population than in men and some ethnic populations are more or less demonstrated by this anatomical variant. Experts on anatomy discuss their purpose and quote it as part of the muscle pectoralis, which was somehow diverted from the main body of the muscle. Landically, it is important that its presence can disrupt the interpretation of mammography. This particular muscle, if present, is placed in parallel with the breast bone, which is a long narrow flat bone that flows through the center of the chest between the ribs. Similar length and width on the thoracic bone, sternalis immediately sits on both sides of the surface of the surface on or on top of the pectoralis major. Usually comes on the underside of the collarbone or collarbone, as well as on the manubrium or the head of the sternum.

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point of insertion or surface to which the lower end of the sternalis connects can be less predictable. It is said that this muscle puts anywhere from the fascia or housing surrounding the main muscles of the pectoralis into the thoracic basket under the thoracic tasting to the fascia of the abdominal muscles. It can therefore have several inches in length or almost non -existent, which has only a small number of fibers. In addition, it can be unilateral, with a muscle present only on one side of the body.

This anatomical variant is not well understood by medical experts who discuss its purpose. On the front of the fuselage is several over longitudinal muscles running along the middle line of the body, such as rectus abdominal, muscle commonly referred to as "six packages". Such a muscle is designed to bend forward parts of the body, which includes, as in the abdominal crisis.

The game does not allow the spine it does not allow much forward. Instead the blades move forwardin the movement called Prodcation. As such, there is no need for a longitudinal muscle in the chest wall.

One of the concerns that experts expressed in the presence of sternalis is that while the anatomists are familiar with this muscle, doctors may not be. Therefore, they can incorrectly identify this during routine procedures or confuse it with a foreign tissue. For example, during mammography, the practice of depicting female breasts may identify potentially cancer lumps, sternalis may be mistaken for anomaly in the thoracic wall, and therefore contribute to incorrect diagnosis.