El dorsal ancho es un músculo extrínseco del hombro. Inserciones: se origina en las apófisis espinosas de las vértebras T7-T12, la cresta ilíaca, la fascia toracolumbar y las tres costillas inferiores. Las fibras convergen en un tendón que se inserta en el surco intertubercular del húmero. Acciones: extensión, aducción y rotación medial de la extremidad superior a nivel del hombro. Inervación: nervio toracodorsal. Irrigación sanguínea: arteria toracodorsal. By TeachMeSeries Ltd (2026) Fig. 1: los músculos superficiales de la espalda. Característica Pro - Modelo en 3D 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 Característica Pro - Atlas de disección The superficial and intermediate muscles of the back The superficial and intermediate muscles of the back You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the origin of the latissimus dorsi muscle? The latissimus dorsi muscle originates from the spinous processes of the T7-T12 vertebrae, the iliac crest, the thoracolumbar fascia, and the lower three ribs. This broad origin contributes to its extensive attachment and functional capabilities. What actions does the latissimus dorsi perform at the shoulder? The latissimus dorsi is responsible for the extension, adduction, and medial rotation of the upper limb at the shoulder joint. These actions are crucial for various movements, such as pulling and lifting. Which nerve innervates the latissimus dorsi muscle? The latissimus dorsi muscle is innervated by the thoracodorsal nerve. This nerve plays a vital role in enabling the muscle's functions during upper limb movements. Where does the latissimus dorsi insert on the humerus? The latissimus dorsi inserts into the intertubercular groove of the humerus via a tendon formed by the converging muscle fibers. This specific insertion point is essential for its role in shoulder mechanics. What is the blood supply for the latissimus dorsi muscle? The blood supply to the latissimus dorsi muscle comes from the thoracodorsal artery. This vascular supply is important for maintaining the muscle's health and functionality. Valora este artículo