Anterior abdominal wall

muscles of ant abd wall

1. Anterior abdominal wall Maj Rishi Pokhrel Dept of anatomy NAIHS www.slideshare.net

2. What makes 6 packs??

3. Bony framework

4. Inguinal ligament

5. Boundaries & surface division

6. Layers

7. Layers

8. Skin

9. Superficial fascia In two layers Camper’s - sup fatty layer Scarpa’s - deep membranous layer CONTENTS Cutaneous nerves Arteries Veins Lymphatics

10. Scarpa’s layer

11. Scarpa’s layer

12. Muscles External oblique Internal oblique Transversus abdominis Rectus abdominis Pyramidalis

13. Linea alba and rectus sheath

14. External oblique Origin: external surfaces and inferior borders of 5-12 ribs with serr ant and lat dorsi Insertion : iliac crest, linea alba, forms inguinal ligament Direction : inferiorly and anteriorly Nerve supply : T7 – L1

15. Internal oblique Origin: thoracolumbar fascia, iliac crest, lat 2/3 of inguinal ligament Insertion : pectan pubis (conjoint tendon), linea alba, 10-12 ribs Direction : superiorly and anteriorly Nerve supply : T7 – L1

16. Transversus abdominis Origin: thoracolumbar fascia , Iliac crest, lat ½ of inguinal ligament, and costal cartilages 7-12 Insertion: Xiphoid process, linea alba, pubic crest and pecten pubis via conjoint tendon Direction : transverse Nerve supply : T6-L1

17. Conjoint tendon

18. Rectus abdominis Origin: Pubic crest Insertion : costal cartilage 5-7, xiphoid process Direction : vertical Nerve supply : T7-T11 Tendinous intersections

19. Pyramidalis Inconsistent muscle, within rectus sheath Origin: pubic symphysis and pubic crest Insertion : linea alba Nerve supply : T12

20. Blood supply

21. Lymphatic drainage

22. Actions of Muscles of AAW Expulsive acts Forceful expiratory acts Movements of trunk Flexion of trunk (lumbar spine) Lateral flexion of trunk Rotation of trunk Muscles of respiration

23. Support for abdominal viscera Suspension of testis Tensing the linea alba Actions of Muscles of AAW

24. ?