El músculo extensor corto del pulgar es un músculo situado en el compartimento profundo de la parte posterior del antebrazo. El tendón del músculo extensor corto del pulgar atraviesa el primer compartimento extensor de la muñeca, donde contribuye al borde radial de la tabaquera anatómica. Inserciones: se origina en la superficie posterior del radio y en la membrana interósea. Se inserta en la base de la falange proximal del pulgar. Acciones: extensión en las articulaciones 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 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 extensor pollicis brevis muscle? The extensor pollicis brevis is a muscle located in the deep compartment of the posterior forearm, responsible for extending the thumb at the metacarpophalangeal and carpometacarpal joints. Where does the extensor pollicis brevis muscle originate and insert? This muscle originates from the posterior surface of the radius and the interosseous membrane, inserting at the base of the proximal phalanx of the thumb. What actions does the extensor pollicis brevis perform? The primary actions of the extensor pollicis brevis include extension of the thumb at both the metacarpophalangeal and carpometacarpal joints, facilitating thumb movement. Which nerve innervates the extensor pollicis brevis muscle? The extensor pollicis brevis is innervated by the radial nerve, specifically through its posterior interosseous branch. What is the blood supply for the extensor pollicis brevis muscle? The blood supply to the extensor pollicis brevis muscle comes from the ulnar artery, ensuring it receives the necessary nutrients for function. Valora este artículo