Internal abdominal oblique muscle
Musculus obliquus internus abdominis
Definition
Origin: Thoracolumbar fascia and tuber coxae.
Insertion: The aponeurosis on the linea alba and the fleshy ending on the thirteenth rib and cartilage of the twelfth rib.
Action: Compression and support of the abdominal viscera.
Nerve: Medial branches of the last few intercostales and costoabdominalis, iliohypogastricus and ilioinguinalis nerves.
References
Miller's Anatomy of the Dog 4th Edition
