El orbicular del ojo es un músculo orbitario de la expresión facial. Desempeña un papel clave en el cierre de los párpados y, por tanto, en la protección de la córnea de daños. Inserciones: se origina en el margen orbitario medial, el ligamento palpebral medial y el hueso lagrimal. Se inserta en la piel alrededor del margen de la órbita, así como en las placas tarsales del párpado. Acciones: Parte palpebral: cierra suavemente los párpados. Parte lagrimal: implicada en el drenaje de las lágrimas. Parte orbital: cierra firmemente los párpados. Inervación: ramas temporal y cigomática del nervio facial. Irrigación sanguínea: ramas de las arterias maxilar, temporal superficial, facial y oftálmica. By TeachMeSeries Ltd (2026) Fig. 1: los dos músculos orbitarios implicados en la expresión facial. 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 face, demonstrating the anterior facial muscles. Prosection of the face, demonstrating the anterior facial muscles. 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 orbicularis oculi muscle? The orbicularis oculi muscle is essential for closing the eyelids, which protects the cornea from injury. It has three parts: the palpebral, which gently closes the eyelids; the lacrimal, which assists in tear drainage; and the orbital, which firmly shuts the eyelids. Where does the orbicularis oculi muscle originate? The orbicularis oculi muscle originates from the medial orbital margin, the medial palpebral ligament, and the lacrimal bone. These attachments allow it to effectively encircle the eye and perform its functions. How is the orbicularis oculi muscle innervated? The orbicularis oculi muscle is innervated by the temporal and zygomatic branches of the facial nerve. This nerve supply is crucial for the muscle's role in facial expression and eyelid movement. What are the blood supply sources for the orbicularis oculi muscle? The orbicularis oculi muscle receives blood from branches of the maxillary, superficial temporal, facial, and ophthalmic arteries. This vascular supply is vital for maintaining the muscle's health and function. What clinical relevance does the orbicularis oculi muscle have? The orbicularis oculi muscle plays a significant role in eyelid function, and any dysfunction can lead to conditions like lagophthalmos or dry eye. Understanding its anatomy is important for surgical procedures involving the eyelids and surrounding structures. Rate This Article