El músculo extensor largo del pulgar es un músculo situado en el compartimento profundo de la parte posterior del antebrazo. El tendón del músculo extensor largo del pulgar atraviesa el tercer compartimento extensor de la muñeca, donde forma el borde cubital de la tabaquera anatómica. Inserciones: se origina en la superficie posterior del cúbito y la membrana interósea. Se inserta en la base de la falange distal del pulgar. Acciones: extensión en las articulaciones interfalángicas, metacarpofalángicas y carpometacarpianas del pulgar. Inervación: nervio radial (rama interósea posterior). Irrigación sanguínea: arteria cubital. By TeachMeSeries Ltd (2026) Fig. 1: músculos en la capa profunda de la parte posterior del antebrazo. 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 Borders and contents of the anatomical snuffbox Borders and contents of the anatomical snuffbox 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 location of the extensor longus muscle of the thumb? The extensor longus muscle of the thumb is located in the deep compartment of the posterior forearm. It plays a crucial role in thumb movement. What are the attachments of the extensor longus muscle of the thumb? This muscle originates from the posterior surface of the ulna and the interosseous membrane, and it inserts at the base of the distal phalanx of the thumb. What actions does the extensor longus muscle of the thumb perform? The extensor longus muscle is responsible for extending the interphalangeal, metacarpophalangeal, and carpometacarpal joints of the thumb, enabling a wide range of thumb movements. Which nerve innervates the extensor longus muscle of the thumb? The extensor longus muscle of the thumb is innervated by the radial nerve, specifically through its posterior interosseous branch. What is the blood supply for the extensor longus muscle of the thumb? The blood supply to the extensor longus muscle comes from the ulnar artery, ensuring it receives adequate oxygen and nutrients for function. Valora este artículo