Rectus Abdominis is the most superficial of the abdominal muscles. It is this muscle which forms the six-pack shape!
- Crest of the pubis.
- Pubic symphesis.
- Xiphoid process (base of the sternum).
- 5th,6th and 7th costal cartilages.
- Flexes lumbar spine.
- Ventral rami of thoracic nerves.
- Moving from lying to sitting.