El nervio interóseo anterior es una rama motora del nervio mediano. Inerva los músculos profundos de la parte anterior del antebrazo: el flexor largo del pulgar, la mitad lateral del flexor profundo de los dedos y el pronador cuadrado. 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 Trayecto El nervio interóseo anterior se origina en el nervio mediano, en la parte proximal del antebrazo, entre las cabezas del músculo pronador redondo. Desciende por el antebrazo, entre el músculo flexor largo del pulgar y el flexor profundo de los dedos. Va acompañado de la arteria interósea anterior. A la altura de la muñeca, el nervio interóseo anterior discurre en profundidad respecto al músculo pronador cuadrado y se ramifica en pequeñas ramas sensoriales. By TeachMeSeries Ltd (2026) Fig. 1: trayecto del nervio interóseo anterior, una rama del nervio mediano. Pro Feature - Dissection Atlas Prosection of the deep compartment of the anterior forearm, with the superficial muscles divided and reflected. Prosection of the deep compartment of the anterior forearm, with the superficial muscles divided and reflected. 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 Funciones sensoriales El nervio interóseo anterior se ramifica en ramas articulares que contribuyen a la sensibilidad de las articulaciones radiocubital distal, radiocarpiana e intercarpiana. Funciones motoras El nervio interóseo anterior aporta inervación motora al compartimento profundo de la parte anterior del antebrazo: Músculo flexor largo del pulgar Mitad lateral del flexor profundo de los dedos (dedos índice y medio) Cuadrado pronador By TeachMeSeries Ltd (2026) Fig. 2: músculos flexores profundos de la parte anterior del antebrazo. Frequent questions What is the anterior interosseous nerve? The anterior interosseous nerve is a motor branch of the median nerve that innervates specific deep muscles in the anterior compartment of the forearm. These include the flexor pollicis longus, the lateral half of the flexor digitorum profundus, and the pronator quadratus. What muscles are innervated by the anterior interosseous nerve? The anterior interosseous nerve innervates the flexor pollicis longus, the lateral portion of the flexor digitorum profundus (affecting the index and middle fingers), and the pronator quadratus. This innervation is crucial for thumb and finger flexion as well as forearm pronation. Where does the anterior interosseous nerve originate? The anterior interosseous nerve originates from the median nerve in the proximal forearm, specifically located between the heads of the pronator teres muscle. It descends along the forearm, running between the flexor pollicis longus and the flexor digitorum profundus muscles. What is the sensory function of the anterior interosseous nerve? While primarily a motor nerve, the anterior interosseous nerve has sensory functions through its small branches that contribute to the sensation of the distal radioulnar, radiocarpal, and intercarpal joints. These sensory branches enhance proprioception in the wrist and hand. How does the anterior interosseous nerve travel through the forearm? The anterior interosseous nerve travels down the forearm accompanied by the anterior interosseous artery, positioned between the flexor pollicis longus and the flexor digitorum profundus. Near the wrist, it runs deep to the pronator quadratus before branching into smaller sensory nerves. Rate This Article