El músculo digástrico es un músculo suprahioideo del cuello. Está formado por dos vientres musculares unidos por un tendón. Inserciones: El vientre anterior se origina en la fosa digástrica de la mandíbula. El vientre posterior se origina en el proceso mastoideo del hueso temporal. Los dos vientres están unidos por un tendón intermedio, que se inserta en el hueso hioides a través de una banda fibrosa. Acciones: deprime la mandíbula y eleva el hueso hioides. Inervación: El vientre anterior está inervado por el nervio alveolar inferior, una rama del nervio mandibular (que se deriva del nervio trigémino, NC V). El vientre posterior está inervado por la rama digástrica del nervio facial. Irrigación sanguínea: la arteria vertebral y la rama descendente profunda de la arteria occipital. By TeachMeSeries Ltd (2026) Fig 1: vista lateral del cuello en la que se destacan tres de los músculos suprahioideos (el digástrico, el milohioideo y el estilohioideo). By TeachMeSeries Ltd (2026) Fig. 2: Vista anterior del cuello con los músculos suprahioideos destacados. 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 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 digastric muscle? The digastric muscle is a suprahyoid muscle located in the neck, consisting of two muscle bellies connected by an intermediate tendon. This muscle plays a crucial role in movements involving the jaw and hyoid bone. What are the attachments of the digastric muscle? The anterior belly of the digastric muscle originates from the digastric fossa of the mandible, while the posterior belly arises from the mastoid process of the temporal bone. Both bellies connect via a tendon that inserts into the hyoid bone. What actions does the digastric muscle perform? The digastric muscle depresses the mandible and elevates the hyoid bone during swallowing and speaking. These actions are essential for proper oral and pharyngeal function. What is the innervation of the digastric muscle? The anterior belly of the digastric muscle is innervated by the inferior alveolar nerve, a branch of the mandibular nerve, while the posterior belly receives innervation from the digastric branch of the facial nerve. This dual innervation is important for its coordinated movements. What is the blood supply to the digastric muscle? The digastric muscle is supplied by the vertebral artery and the deep descending branch of the occipital artery. This vascular supply ensures adequate oxygen and nutrients for muscle function. Rate This Article