Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan Universitv Muscles of abdomen Anterolateral group 4 Posterior group 2 Anterolateral group 1. External oblique m of abdomen 2. Internal oblique m of abdomen 3. Transversus abdominis 4. Rectus abdominis Posterior group 1. Psoas major 2. Lumbar quadrate m Copy Right- Hongqi ZHANG-Department of AnatonCopy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Muscles of abdomen Posterior group 1. Psoas major 2. Lumbar quadrate m. Anterolateral group 4 Posterior group 2 Anterolateral group 1. External oblique m.of abdomen 2. Internal.oblique m.of abdomen 3. Transversus abdominis 4. Rectus abdominis 1 2