| Intercostals | O: upper border of rib
I: lower border of rib above |
| Scalenes Ant | O: C3-6 TPs
I: R1 |
| Scalenes medius | O: C1-7 TPs
I: R1 |
| Scalenes pos | O: C4-6 TPs
I: R2 |
| Levator costorum | O:C7-T11 TPs
I: upper border of rib below |
| Subcostals | like innermost intercostals but jumping 1-2 spaces |
| Serratus pos sup | O: C7-T3 spinous processes
I: Angles of R2-5 |
| Serratus pos inf | O: T11-L2 SPs
I: Angles of R9-12 |
| Quadratus lumborum | O: iliac crest and adj illiolum lig
I: medial half of R12s lower border |
| Pyramidalis | O: pubic crest
I: lower linea alba |
| Transverse abdominus | O: inner costal cart of lower 6 ribs
I: inguinal lig + TC fascia + illiac crest |
| Rectus abdominus | O: xyphoid process and costal cart R5-7
I: pubic crest and symphysis |
| Internal oblique | O: lower border of lower 4 ribs and costal carts
I: linea alba + iliac crest |
| External oblique | O: outer border lower 8 ribs and cost carts
I: linea alba _ iliac crest |
| Diaphragm | O:
• L1-3 bodies and discs
• inner surface of the lower six ribs and costal cartilages
• posterior surface of the xiphoid process of the sternum
I: central tendon |
