Musculus obliquus externus abdominis

Origin: on the eight lower ribs.

Insertion:

• labium externum cristae iliacae;
• linea alba (via Rectus sheath of musculus rectus abdominis).

Innervation:

• nervi intercostales (5.–11.);
• nervus subcostalis.

Function:

• bends spine;
• changes the tilt of the pelvis;
• participates in the abdominal press;
• rotates the spine

Formations on the obliquus externus abdominis muscle:

• aponeurosis musculi obliqui externi: the tendon into which the muscle passes forward;
• inguinal ligament: lower thickening of the aponeurosis;
• anulus inquinalis superficialis: entrance to inguinal canal.

Links

References

• ČIHÁK, Radomír – GRIM, Miloš. Anatomie. 2. upr. a dopl edition. Grada Publishing, 2001. 497 pp. vol. 1. ISBN 80-7169-970-5.