The internal oblique (obliquus internus abdominis) is a small, thin, deep muscle of the abdomen. It runs diagonally opposite underneath the external oblique. It has a quadrilateral form originating from the hipbone (crest of the ilium), and extending to the cartilage of the lower ribs (the tenth, elenenth, and twelfthribs). It is innervated by the lower thoracic nerves and supplied the intercostal and lumbar arteries. This muscle protects a weak point in the abdominal wall and works with the external oblique to help twist the torso. Research Internal Oblique
Abbreviations
Medicine
Research Internal Oblique