El constrictor inferior de la faringe es un músculo de la faringe. Se describe como compuesto por dos músculos: el tirofaríngeo y el cricofaríngeo. Inserciones: Las fibras tirofaríngeas se originan en el cartílago tiroides. Las fibras cricofaríngeas se originan en el cartílago cricoides. Todas las fibras se insertan posteriormente en el rafe faríngeo. Acción: Durante la deglución, contrae la pared de la faringe para impulsar el bolo alimenticio hacia abajo. Inervación: nervio vago (NC X). Irrigación sanguínea: rama faríngea de la arteria tiroidea ascendente y ramas de la arteria tiroidea inferior. By TeachMeSeries Ltd (2026) Fig. 1: vista lateral de las estructuras profundas de la faringe. Se aprecian los músculos circulares de la faringe y el músculo estilofaríngeo. Característica Pro - Modelo en 3D Premium Feature Explore, cut, dissect, annotate and manipulate 3d models to visualize anatomy in interactive and dynamic way. Pasarse a la versión Premium Frequent questions What is the constrictor inferior de la faringe? The constrictor inferior de la faringe is a muscle located in the pharynx, consisting of two parts: the thyropharyngeus and the cricopharyngeus. It plays a crucial role in swallowing by contracting to propel food downwards. What are the attachments of the constrictor inferior de la faringe? The thyropharyngeus fibres originate from the thyroid cartilage, while the cricopharyngeus fibres arise from the cricoid cartilage. Both sets of fibres insert into the posterior pharyngeal raphe. What is the function of the constrictor inferior de la faringe during swallowing? During swallowing, the constrictor inferior de la faringe contracts to narrow the pharyngeal wall, facilitating the downward movement of the food bolus. This action is essential for effective swallowing. Which nerve innervates the constrictor inferior de la faringe? The constrictor inferior de la faringe is innervated by the vagus nerve (cranial nerve X). This nerve is responsible for the motor control of the muscle during swallowing. What is the blood supply to the constrictor inferior de la faringe? The blood supply to the constrictor inferior de la faringe comes from the pharyngeal branch of the ascending thyroid artery and branches of the inferior thyroid artery. This vascular supply is vital for the muscle’s function and health. Valora este artículo