Los músculos intercostales íntimos forman parte de la pared torácica. Son los músculos intercostales más profundos. Sus fibras están orientadas en dirección inferior y posterior. Inserciones: se originan en el borde medial del surco costal y se insertan en la superficie superior de la costilla inferior. Acciones: estabilizan la posición de las costillas durante la respiración normal. Empuja las costillas hacia abajo y reduce el volumen torácico durante la espiración forzada. Inervación: nervios intercostales (T1-T11). Irrigación sanguínea: arterias intercostales anteriores y posteriores. By TeachMeSeries Ltd (2026) Fig. 2: vista del interior de la pared torácica. Se aprecian los músculos intercostales internos y el músculo transverso del tórax. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Frequent questions What are the intercostales íntimos muscles? The intercostales íntimos are the deepest muscles of the thoracic wall, located between the ribs. They play a crucial role in stabilising the ribs during breathing. What is the function of the intercostales íntimos? These muscles stabilise the position of the ribs during normal respiration and assist in pushing the ribs downwards to reduce thoracic volume during forced expiration. Where do the intercostales íntimos muscles attach? The intercostales íntimos originate from the medial border of the costal groove and insert on the superior surface of the inferior rib. This positioning allows them to effectively influence rib movement. How are the intercostales íntimos innervated? The intercostales íntimos are innervated by the intercostal nerves, specifically from T1 to T11. This innervation is essential for their motor function during respiration. What is the blood supply to the intercostales íntimos? The blood supply to the intercostales íntimos comes from both the anterior and posterior intercostal arteries. This vascularisation supports their activity during respiratory movements. Rate This Article