El oblicuo interno es un músculo de la pared abdominal anterior. Es un músculo ancho y laminar, situado en profundidad respecto del oblicuo externo. Inserciones: se origina en el ligamento inguinal, la cresta ilíaca y la fascia lumbodorsal. Se inserta en las costillas 10 a 12. Acciones: la contracción bilateral comprime el abdomen, mientras que la contracción unilateral hace girar el torso ipsilateralmente. Inervación: los nervios toracoabdominales (T7-T11), el nervio subcostal (T12) y las ramas del plexo lumbar. Irrigación sanguínea: arterias intercostales posteriores inferiores y subcostales, arterias epigástricas superior e inferior, arterias circunflejas superficial y profunda, arterias lumbares posteriores. By TeachMeSeries Ltd (2026) Fig. 1: vista lateral de la pared abdominal. Se aprecia el oblicuo interno, obsérvese que sus fibras son perpendiculares a las del oblicuo externo. 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 Característica Pro - Atlas de disección Dissection of the anterolateral abdominal wall Dissection of the anterolateral abdominal wall 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 oblicuo interno muscle? The oblicuo interno is a broad, flat muscle located in the anterior abdominal wall, lying deep to the oblicuo externo. It plays a crucial role in abdominal compression and torso rotation. What are the attachments of the oblicuo interno? The oblicuo interno originates from the inguinal ligament, iliac crest, and lumbodorsal fascia, and it inserts onto the 10th to 12th ribs. These attachments contribute to its function in stabilising the abdomen. What actions does the oblicuo interno perform? The oblicuo interno compresses the abdomen during bilateral contraction, while unilateral contraction results in ipsilateral torso rotation. This dual functionality aids in various movements and stabilisation of the trunk. What nerves innervate the oblicuo interno? The oblicuo interno is innervated by the thoracoabdominal nerves (T7-T11), the subcostal nerve (T12), and branches from the lumbar plexus. This innervation is essential for its motor function. What is the blood supply for the oblicuo interno? The blood supply to the oblicuo interno comes from the lower posterior intercostal arteries, subcostal arteries, superior and inferior epigastric arteries, superficial and deep circumflex iliac arteries, and lumbar arteries. This vascularisation is vital for the muscle's health and function. Valora este artículo