Zanabazar Endocast (image) American Museum of Natural History Caption This CT scan shows the transparent skull and opaque brain cast of Zanabazar junior, a troodontid dinosaur. The endocast is partitioned into the following neuroanatomical regions: brain stem (yellow), cerebellum (blue), optic lobes (red), cerebrum (green), and olfactory bulbs (orange). Credit ©AMNH/A. Balanoff Usage Restrictions Can be used with appropriate credit 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.