rectus sheath, the sheath covering rectus muscle of anterior abdominal wall, formation of the sheath, the muscles involved in ts formation, and the contents the sheath is covering

1. RECTUS SHEATH
Dr. SANA YASEEN
ANATOMY DEPARTMENT
KIMS

2. RECTUS SHEATH
• Is aponeurotic sheath formed by oblique and
transverse muscle
• Has 2 walls
Anterior- complete
Posterior- in complete

4. • Above costal margin:
Anterior- external oblique
Posterior- deficiet
• Between costal margin and
arcuate line
Anteior – external oblique
Internal oblique (anterior fibers)
Posterior- transverses abdominus
internal oblique
posterior fiber
Below arcuate line:
Anterior- ext oblique, internal
oblique, transverses
abdominus
Posterior- deficiet

5. contents
• Muscles: rectus abdominis, pyramidalis muscle
• Nerve: lower 6 thoracic nerve
lower 5 intercostal nerve
subcostal nerve
• Arteries : superior epigastric artery
inferior epigastric artery
• Vein: superior epigastric vein
inferior epigastric vein

6. FUNCTION
• Maintain strength of anterior abdominal wall
• Increase efficiency of muscle