Rectus Sheath anatomy.pptx

recutus abdominis muscle

1. Anterolateral muscles of the abdomen

2. 1. above the costal margin 2. between costal margin and arcuate line 3. Below the arcuate line Formation of rectus sheath

3. 1. Above the costal margin Anterior wall: External oblique aponeurosis Posterior wall: It is deficient; the rectus muscle rests directly on 5 th , 6 th , and 7 th costal cartilages.

4. 2. Between costal margin and arcuate line Anterior wall: 1. external oblique aponeurosis 2.Anterior lamina of aponeurosis of internal oblique Posterior wall Posterior lamina of aponeurosis of internal oblique Aponeurosis of the transversus muscle