El nervio infratroclear es un nervio sensitivo de la región periorbitaria. Aporta inervación sensitiva a la parte medial de la piel que rodea la órbita, la conjuntiva y el aparato lagrimal. 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 infratroclear se origina dentro de la órbita ósea como una rama terminal del nervio nasociliar (que a su vez es una rama de la división oftálmica del nervio trigémino). Pasa anteriormente en la órbita, a lo largo del borde superior del músculo recto medial. Por debajo de la tróclea del oblicuo superior, el nervio infratroclear sale de la órbita y se adentra en el rostro. Se ramifica en numerosas ramas cutáneas que irrigan la piel que rodea la órbita. By TeachMeSeries Ltd (2026) Fig. 1: el nervio infratroclear surge dentro de la órbita ósea como una rama terminal del nervio nasociliar. Inervación sensitiva El nervio infratroclear aporta inervación sensitiva a las siguientes estructuras: Piel y conjuntiva del párpado superior. Piel de la cara lateral de la parte superior de la nariz. Aparato lagrimal superficial y carúncula lagrimal. Frequent questions What is the function of the infratrochlear nerve? The infratrochlear nerve is a sensory nerve that provides innervation to the medial skin surrounding the orbit, the conjunctiva, and the lacrimal apparatus. It plays a crucial role in sensation for these areas. Where does the infratrochlear nerve originate? The infratrochlear nerve originates within the bony orbit as a terminal branch of the nasociliary nerve, which is a branch of the ophthalmic division of the trigeminal nerve. This anatomical relationship is important for understanding its sensory functions. What structures receive sensory innervation from the infratrochlear nerve? The infratrochlear nerve innervates the skin and conjunctiva of the upper eyelid, the skin on the lateral aspect of the upper nose, and the superficial lacrimal apparatus, including the lacrimal caruncle. This distribution highlights its role in facial sensation. How does the infratrochlear nerve travel within the orbit? The infratrochlear nerve travels anteriorly along the superior border of the medial rectus muscle within the orbit. It exits the orbit beneath the trochlea of the superior oblique muscle to innervate facial structures. What is the clinical significance of the infratrochlear nerve? The infratrochlear nerve is clinically significant as it supplies sensory innervation to key facial areas, and any damage to this nerve can lead to sensory loss in the corresponding regions. Understanding its pathway and innervation can aid in diagnosing facial nerve injuries. Rate This Article