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Navarro PTA O.I.A.N
Trunk Anterior
| Muscle | Origin | Insertion | Action | Nerve |
|---|---|---|---|---|
| Rectus Abdominis | pubic crest | xyphoid process and costal cartilages of fifth to seventh ribs | trunk flexion and compression of abdomen | seventh through twelfth intercostal nerves |
| Transverse Abdominis | inguinal ligament , iliac crest, thoracolumbar fascia, and costal cartilages of the last 6 ribs | pubic crest, abdominal aponeurosis, and linea alba | compression of abdomen | seventh through twelfth intercostal iliohypogastric, and ilioinguinal nerves |
| Internal Oblique | inguinal ligament , iliac crest, thoracolumbar fascia | tenth through twelfth ribs and linea alba | bilateral: trunk flexion and compression of abdomen unilateral: trunk lateral bending and rotation to the same side | eight through twelfth intercostal iliohypogastric, and ilioinguinal nerves |
| External Oblique | lower eight ribs laterally | iliac crest, pubic tubercle, and linea alba | bilateral: trunk flexion and compression of abdomen unilateral: trunk lateral bending and rotation to the opposite side | eight through twelfth intercostal iliohypogastric, and ilioinguinal nerves |