The abdominal internal oblique muscle is located in the wall of the abdomen. There are a few other muscles around the abdominal internal oblique muscle and they are the external oblique muscle and the thoracolumbar fascia. These are located in the lower back area.
The subcostal arteries are connected to this muscle along with the thoracoabdominal nerve. The main function of this muscle is to flatten or press onto the abdomen. Most people are aware of this muscle because it is used when doing abdominal crunches.
If a patient has an emergent hernia, the structure that is formed by the contribution of the internal oblique abdominis muscle is the falx inguinalis. A hernia is a painful problem that many people experience.
Falx inguinalis-the falx inguinalis (conjoint tendon) is formed by the aponeuroses of the internal oblique and transverse muscles of the abdomen. the inguinal ligament is formed byaponeurosis of the external oblique abdominal muscle and the reflected inguinal ligament is formed by certain fibers of the inguinal ligament reflected from the pubic tubercle upward toward the linea alba. the deep inguinal ring lies in the transversalis fascia, and the internal spermatic fascia is formed by the transversalis fascia.