Nervous System Role in Regeneration (IMAGE) Tufts University Caption Regeneration of the flatworm is guided by neural patterns. Middle segment excised with an additional cutout along the ventral nerve cord directs regrowth of a complete worm with a second head. Credit Alexis Pietak and Mike Levin, Tufts University Usage Restrictions none License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.