Embryonic Central Nervous System Defects (image) Carnegie Institution for Science Share Print E-Mail Caption This image shows an example of defects in the development of the embryonic central nervous system in stored eggs that lacked the Fmr1 gene -- stored being the key word, since un-stored eggs showed normal development. Analogous to the spinal cord, the ladder-like ventral nerve cords on the right are from stored eggs lacking in Fmr1. The image on the left is a normal ventral nerve cord with functioning Fmr1. Credit Courtesy of Ethan Greenblatt and Allan Spradling. Usage Restrictions With credit Share Print E-Mail 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.