Muscles of abdomen: origin, insertion, action and innervation

4 muscles of this region (Muscles of abdomen) with their origin, insertion, action, nerve and artery. Press a name to see it on the 3D model.

Muscle	Origin	Insertion	Action	Innervation	Arterial supply
internal abdominal oblique muscle Musculus obliquus internus abdominis	inguinal ligament iliac crest thoracolumbar fascia		flexion of the torso rotation of the torso lateral flexion of the torso raising intra-abdominal pressure exhalation	tenth intercostal nerve eleventh intercostal nerve subcostal nerve sixth intercostal nerve seventh intercostal nerve eighth intercostal nerve Anterior ramus of first lumbar nerve iliohypogastric nerve ilio-inguinal nerve	subcostal artery
pyramidalis muscle Musculus pyramidalis	pubic symphysis pubic crest	linea alba		subcostal nerve iliohypogastric nerve
quadratus lumborum muscle Musculus quadratus lumborum	iliac crest iliolumbar ligament	rib lumbar vertebra	extension of the torso lateral flexion of the torso	thoracic nerves lumbar nerves subcostal nerve	lumbar arteries lumbar branch of iliolumbar artery
transversus abdominis muscle Musculus transversus abdominis	costal cartilage iliac crest inguinal ligament thoracolumbar fascia	linea alba pubis pubic symphysis	raising intra-abdominal pressure exhalation	Anterior ramus of first lumbar nerve seventh intercostal nerve eighth intercostal nerve ninth intercostal nerve tenth intercostal nerve eleventh intercostal nerve subcostal nerve perineal branch of pudendal nerve Anterior ramus of third sacral nerve Anterior ramus of fourth sacral nerve iliohypogastric nerve ilio-inguinal nerve	subcostal artery