Cell models (IMAGE) Karolinska Institutet Caption iPS-derived neural stem cells in green and neurons in red from a healthy individual (to the left) and a person with lissencephaly (to the right). The sample from the healthy person gives rise to fewer immature cells (neural stem cells). Credit Falk Laboratory Usage Restrictions The image may only be used in connection with articles about this study. 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.