El músculo flexor corto del pulgar es un músculo tenar situado en la mano. Forma la cara medial de la eminencia tenar y se describe como compuesta por una parte superficial y otra profunda (aunque el tamaño de la parte profunda es variable). Inserciones: se origina en el tubérculo del trapecio y en el retináculo flexor asociado. Se inserta en la base de la falange proximal del pulgar. Acciones: flexiona la articulación metacarpofalángica del pulgar. Inervación: nervio mediano (rama recurrente). La cabeza profunda está inervada por la rama profunda del nervio cubital. Irrigación sanguínea: arco palmar superficial. By TeachMeSeries Ltd (2026) Fig. 1: vista palmar de los músculos tenares. 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 Pro Feature - Dissection Atlas Prosection of the deeper structures of the hand. The deep branch of the ulnar nerve innervates the majority of the muscles of the hand (except the lateral two lumbricals and the thenar eminence). Note the two-headed structure of the adductor pollicis. Prosection of the deeper structures of the hand. The deep branch of the ulnar nerve innervates the majority of the muscles of the hand (except the lateral two lumbricals and the thenar eminence). Note the two-headed structure of the adductor pollicis. 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 function of the flexor pollicis brevis muscle? The flexor pollicis brevis muscle flexes the metacarpophalangeal joint of the thumb. This action is essential for gripping and pinching movements. Where does the flexor pollicis brevis muscle originate and insert? This muscle originates from the tubercle of the trapezium bone and the associated flexor retinaculum, inserting at the base of the proximal phalanx of the thumb. What nerves innervate the flexor pollicis brevis muscle? The flexor pollicis brevis is primarily innervated by the median nerve through its recurrent branch, while the deep head receives innervation from the deep branch of the ulnar nerve. What blood supply supports the flexor pollicis brevis muscle? The flexor pollicis brevis muscle is supplied by the superficial palmar arch, which provides the necessary blood flow to sustain its function. How is the flexor pollicis brevis muscle structured? The muscle is composed of two parts: a superficial head and a variable-sized deep head, contributing to its overall function in thumb movement. Rate This Article