interkostalmuskulaturen

Interkostalmuskulaturen, also known as the intercostal muscles, are a group of muscles located between the ribs (costae) that play a crucial role in the mechanics of respiration. These muscles facilitate the expansion and contraction of the thoracic cavity, enabling effective inhalation and exhalation.

There are three main types of intercostal muscles: external, internal, and innermost. The external intercostal muscles are the most superficial layer and run obliquely downward and forward from the rib above to the rib below. They assist in elevating the ribs during inspiration, increasing the volume of the thoracic cavity. The internal intercostal muscles lie beneath the external layer, running at right angles to them, and primarily aid in decreasing the thoracic volume during forced expiration by drawing the ribs downward and inward. The innermost intercostal muscles are the deepest layer, situated close to the inner thoracic wall, and are thought to contribute to the stabilization of the rib cage.

These muscles are innervated by the intercostal nerves, which originate from the thoracic spinal nerves (T1 to T11). Their blood supply primarily derives from the intercostal arteries, which branch from the thoracic aorta and other neighboring arteries.

The intercostal muscles are vital for maintaining proper respiratory function and are involved in various respiratory conditions when injured or dysfunctional. They also serve as attachment points for other muscles involved in the thorax and upper limb movement.

Overall, the interkostalmuskulaturen are essential components of the respiratory musculature, facilitating lung expansion and protecting the thoracic cavity's structural integrity.